Historical product responses · Corporate discovery/product response
Armstrong insulation product identification and years
Lists Nonpareil, L.T. Cork Covering and other insulation categories with manufacturer and installation distinctions.
Armstrong historical research
Armstrong Original Documents and Historical Records
Read primary records, company responses, patents and court decisions underlying the Armstrong historical research.
What the records establish
Some records are contemporaneous product descriptions or patents. Others are later corporate discovery responses or court decisions describing earlier events. The type and date of each source are identified below.
Follow a specific product
Begin with the product name or activity, then compare the period and the document. An original patent about corkboard is not evidence that every Armstrong cork product contained asbestos.
Follow the documentary trail
Source repositories and courts are identified here. Links open the original record or the identified source page.
Contracting history · Corporate discovery response
Armstrong Contract Department historical product account
Describes contracting, installation and products made by other companies.
1990 · Federal government notice
Federal Register asbestos product identification
Contains Armstrong World Industries product descriptions, forms and manufacturing periods.
1996 · California Court of Appeal decision
Armstrong World Industries v. Aetna
Discusses L.T. Cork Covering, Armaspray, Limpet, company chronology and product history.
1949 · Armstrong Cork Company patent
Method of making corkboard insulation
Patent drawings and text illustrate corkboard manufacturing; this patent alone does not establish asbestos content.
1954 / later retrospective · Manufacturer historical account
ArmaFlex invention and patent history
Explains ArmaFlex development and flexible foam insulation; useful for distinguishing product families.
2000 exhibit list · Litigation exhibit index, not underlying exhibits
Armstrong historical annual reports and deposition exhibits index
Identifies historical annual reports, spray equipment exhibits and product lists; individual exhibits require separate retrieval.
Start with what you remember
Remember a product, a room, a crew, an old carton or a period of work? Those details can guide a historical investigation.