Patent US3670348A successfully refreshed from Google Patents.
US3670348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient, fire-resistant article
Assignee: PPG Industries Inc
•
Filing: 1968-05-13
•
Granted: 1972-06-20
•
Expires: 1988-05-13
Abstract
Abstract This relates to a safety mattress, pillow, cushion, upholstered article and the like, comprising a layer of flexible sheet material covering an incombustible, resilient, low-bulk, highdensity mass of interlocked segments of fiber glass filaments that are free of organic binder and have a permanently distorted shape extending in a plurality of directions when said filaments are substantially free of tension.
Inventors
- 👤 Winfield T Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:17
CPC Classifications
A; A47; A47C; A47C31/00; A47C31/001; Y; Y10; Y10S; Y10S5/00; Y10S5/948; Y10S5/952; Y10S5/954; Y10T; Y10T442/00; Y10T442/60; Y10T442/696
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A resilient, fire-resistant safety mattress, pillow, cushion, upholstered article and the like comprising a cushionable core, a pad covering said core, said pad comprising an incombustible, resilient, low-bulk, high-density mass of interlocked segments of fiber glass filaments that are free of organic binder and incapable of emitting toxic fumes at elevated temperatures and that have a permanently distorted shape extending in a plurality of directions when said filaments are substantially free of tension, and a flexible sheet material covering said pad, wherein said cushionable core material comprises a strand-fiber composite material composed of randomly-oriented, essentially uniformlydistributed glass fiber strands interspersed throughout a mass of randomly-oriented and essentially uniformly-distributed individual glass fibers.
Claim 2
Dependent Claim
111 words
A resilient, fire-resistant safety mattress, pillow, cushion, upholstered article and the like comprising a cushionable core, a pad covering said core, said pad comprising an incombustible, resilient, low-bulk, high-density mass of interlocked segments of fiber glass filaments that are free of organic binder and incapable of emitting toxic fumes at elevated temperatures and that have a permanently distorted shape extending in a plurality of directions when said filaments are substantially free of tension, and a flexible sheet material covering said pad, wherein said cushionable core material comprises a strand-fiber composite material composed of randomly-oriented, essentially uniformlydistributed glass fiber strands interspersed throughout a mass of randomly-oriented and essentially uniformly-distributed individual glass fibers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |