Documents in our library describe Therm-O-Tec (National Gypsum) as “asbestos-cement board”.1 They give it as sold from 1960.1
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What each document says
Every statement about Therm-O-Tec (National Gypsum) in the documents, in each document's own words.
USPTO trademark case files (Trademark Full Text XML Data, Annual Applications, 2025 edition)
- Sold from: “first used in commerce 1960-11-07”, said by NATIONAL GYPSUM COMPANY, as recorded by U.S. Patent and Trademark Office1
- Description: “ASBESTOS-CEMENT BOARD”, said by NATIONAL GYPSUM COMPANY, as recorded by U.S. Patent and Trademark Office1
Kind of product
We list Therm-O-Tec (National Gypsum) with asbestos-cement pipe, board and sheet, from how the documents describe it. That page explains how such products exposed workers.
Trades that worked with products like it: Carpenters and Construction Workers.
Other asbestos-cement pipe, board and sheet by National Gypsum (12)
Asbestone · Woodrock · Asbestos Permaboard · Asbestone 400 · Economy 250 · Pliaboard · Chroma-Tone · Classic-Shake · Humigard · Pps · Ranch Style · Sussex 32
Asbestos-cement pipe, board and sheet by other makers (371)
Flexboard (Johns-Manville) · Thermobestos · Careytemp (Philip Carey) · Min-k (Johns-Manville) · Unibestos (Union Asbestos & Rubber Co.) · Supra-Tones (Supradur) · Supradur (Supradur) · Suprawall (Supradur) · Suramic (Supradur) · T-deck (Keasbey & Mattison) · Temp-Tite (Johns-Manville) · Therm-o-bestos (Johns-Manville) · Thermalux (U.S. Gypsum) · Thermo Fire Felt (Johns-Manville) · Thermo-board (Philip Carey) · Thermomat (Johns-Manville) · Thermowrap (Johns-Manville) · Timbertex (Ruberoid) · Tip Top (Ambler Asbestos Shingle & Sheathing Company) · Top Notch (Lehon) · and 351 more: all asbestos-cement pipe, board and sheet
See also
- National Gypsum: the company's history, documents, people, products and plants
- National Gypsum on our products page: what the documents say about the company's asbestos products, with sources
References
- USPTO trademark case files (Trademark Full Text XML Data, Annual Applications, 2025 edition) (October 9, 1964). Not yet published in our library.
Cite this page
“Therm-O-Tec (National Gypsum).” AsbestosClaims.Law Library. https://asbestosclaims.law/library/products/national-gypsum-therm-o-tec.
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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.