No fee unless we recover compensation for your family Text size 833-4-ASBESTOS (833-427-2378) Free Case Review

Microbestos (Johns-Manville)

Microbestos was a Johns-Manville asbestos paper.1,2 In sworn answers in two lawsuits against Fibreboard and others, the Borel and Potter cases, J-M described Microbestos Paper in 1969 and 1970 as "an asbestos reinforcing material which after saturation is used in the manufacture of reinforced plastic products."1,2

The documents give different dates. A 1990 EPA notice that published what Manville reported lists Microbestos in a group of asbestos papers and rollboards, with Armaturo, Doublex, Fibroid, Long Fiber, Non-Burn and Welding Paper, produced from 1900 to 1965.3 An insurance company's 1981 list of asbestos products, compiled from other companies' answers in lawsuits, lists Microbestos under paper, felt and blankets, made by Johns-Manville from 1959 to 1981, the year of the list itself.4

For the 1990 notice's group as a whole, not for Microbestos alone, Manville gave 40 to 99% asbestos and 1 to 60% inorganic binder.3

Related: Doublex.

You don't need the product names or old records. No fee unless we recover compensation for your family.

Call 833-4-ASBESTOS Request a review

Asbestos claims

If you or a family member worked with or around Microbestos (Johns-Manville) and later developed mesothelioma or another asbestos disease, a claim may be paid by the Manville Personal Injury Settlement Trust. Free case review.

What each document says

Every statement about Microbestos (Johns-Manville) in the documents, in each document's own words.

The Borel v. Fibreboard Case File (1969-1972), Answers to interrogatories with exhibits

  • Use: “used in the manufacture of reinforced plastic products”, p. 261
  • Description: “MICROBESTOS PAPER. (Asbestos Paper) An asbestos reinforcing material which after saturation is used in the manufacture of reinforced plastic products.”, p. 261

The Potter v. Fibreboard Case File (1969-1972), Answers to plaintiff's interrogatories with exhibits

  • Description: “(Asbestos Paper) An asbestos reinforcing material which after saturation is used in the manufacture of reinforced plastic products”, p. 262

Asbestos; Publication of Identifying Information (1990)

  • Made from: “produced 1900 to 1965”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143
  • Made until: “produced 1900 to 1965”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143
  • Form: “Asbestos paper and rollboard”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143
  • Asbestos content: “asbestos, 40 to 99%”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143
  • Binder: “inorganic binder, 1 to 60%”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143

The Travelers Insurance Company's Product Information Booklet for Its Asbestos Seminar (1980–1981)

  • Made from: “59”, p. 64
  • Form: “PAPER,FELT,BLANKETS”, p. 64
  • Made until: “81”, p. 64

Manville Fund's Answers to Interrogatories in Gunn v. Celotex (1989)

  • Made from: “Date Manufactured: 1959”, p. 1165
  • Asbestos content: “asbestos containing”, p. 635
  • Asbestos content: “40.0 - 97.0 % fiber by weight”, p. 1165
  • Asbestos fiber: “Chrysotile”, p. 1165
  • Form: “Paper”, p. 1165
  • Made at: “Manville Plant, Manville, New Jersey (1913 through 1985): Microbestos Paper” (at Manville) (the plant: Manville, New Jersey), p. 635
  • Description: “A high grade chrysotile asbestos paper which can be readily saturated with various resins to provide a very uniform prepreg reinforcing material”, p. 795
  • Made until: “Date Discontinued: Approximately 1980”, p. 1165
  • Warning label: “Date Labeled: None”, p. 1165
  • Asbestos fiber: “A high grade chrysotile asbestos paper”, p. 795
  • Use: “for use in the manufacture of reinforced plastic products and in the oblative field”, p. 795

USPTO trademark case files (Trademark Full Text XML Data, Annual Applications, 2025 edition)

  • Sold from: “first used in commerce 1961-07-19”, said by JOHNS-MANVILLE CORPORATION, as recorded by U.S. Patent and Trademark Office6
  • Description: “ASBESTOS PAPER ESPECIALLY DESIGNED AND SOLD FOR SATURATION WITH RESINS TO FORM ASBESTOS-REINFORCED PLASTIC PARTS, SUCH AS MOTOR CASES AND BLAST TUBES FOR MISSILES, EXHIBITING THERMAL INSULATING PROPERTIES”, said by JOHNS-MANVILLE CORPORATION, as recorded by U.S. Patent and Trademark Office6

Manville Fund's Responses to Plaintiffs' Interrogatories in Moore v. H.K. Porter (1990)

  • Made at: “Tilton Plant (1948 to 1976): Microbestos” (at Tilton) (the plant: Tilton, New Hampshire), p. 267
  • Asbestos content: “asbestos containing”, p. 227
  • Made at: “Manville Plant (1913 to 1985): Microbestos Paper” (at Manville) (the plant: Manville, New Jersey), p. 227

Kind of product

We list Microbestos (Johns-Manville) with paper, felt and millboard, from how the documents describe its form. That page explains how such products exposed workers.

Other paper, felt and millboard by Johns-Manville (89)

Min-k · Doublex · Thermomat · Firetard · Vitribestos · Flexstone Mineral Surface Cap Sheet · Gold-Line · High Strength Fibroid Asbestos Paper · High Temperature Flexible Min-k Blankets · J-m Built-up Roof · Johns-Manville Jm · Long Fiber Asbestos Paper · Min-klad · Niagarite · Niagrite · No. 50 · Non Burn Asbestos Paper · Non-burn Asb Paper · Nycinsul · Pan-o-cel · and 69 more on the company's page

Paper, felt and millboard by other makers (210)

Pyrotex (Raybestos-Manhattan) · Insubestos (Unarco) · Limpet (Keasbey & Mattison) · Novabestos (Raybestos-Manhattan) · Sal-mo (Nicolet) · Kalfelt (Atlas Asbestos) · Kreuznacher Asbest-Werke Germany Theo & Geo Seitz (Seitz-Asbest Werke, Theo & Geo Seitz) · Kreuznacher Filter-Undasbestwerke Germany.Theo & Geoseitz (Seitz-Asbest Werke, Theo & Geo Seitz) · Lasco (Lynch Asbestos) · Lily (Jujo Paper) · Micabestos (Raybestos-Manhattan) · Micarta 8564 (Westinghouse) · Millboard (GAF) · Muffler (Celotex) · Mule-Hide (Lehon) · Neon (Nicolet) · Nicel (Nicolet) · No. 15 Fiberock (Philip Carey) · No. 15 Tar Fiberock (Philip Carey) · No. 30 Fiberock (Philip Carey) · and 190 more: all paper, felt and millboard

See also

References

  1. The Borel v. Fibreboard Case File (1969-1972), Answers to interrogatories with exhibits (March 27, 1970), p. 26.
  2. The Potter v. Fibreboard Case File (1969-1972), Answers to plaintiff's interrogatories with exhibits (December 29, 1969), p. 26.
  3. Asbestos; Publication of Identifying Information (February 13, 1990), p. 14.
  4. The Travelers Insurance Company's Product Information Booklet for Its Asbestos Seminar (1980–1981) (April 30, 1981), p. 6.
  5. Manville Fund's Answers to Interrogatories in Gunn v. Celotex (December 7, 1989), p. 116.
  6. USPTO trademark case files (Trademark Full Text XML Data, Annual Applications, 2025 edition) (July 31, 1961). Not yet published in our library.
  7. Manville Fund's Responses to Plaintiffs' Interrogatories in Moore v. H.K. Porter (February 15, 1990), p. 26.

Cite this page

“Microbestos (Johns-Manville).” AsbestosClaims.Law Library. https://asbestosclaims.law/library/products/johns-manville-microbestos.

ACL Doc numbers and their short links never change. See how to cite the Library.

Talk with an asbestos lawyer

Start with what you remember, and we'll take it from there.

Call 833-4-ASBESTOS Request a free case review

This page is provided for general informational purposes and does not constitute legal advice. Every asbestos case turns on its own facts, exposure history, diagnosis, deadlines, available evidence, and applicable law. Reviewing this page does not create an attorney-client relationship. For advice about your specific situation, call 833-4-ASBESTOS for a free case review.