US3825464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant carpet and method of preparing same
Assignee: Individual
•
Filing: 1972-07-31
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Granted: 1974-07-23
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Expires: 1992-07-31
Abstract
Abstract A FLAME-RETARDANT CARPET WHICH COMPRISES A SOLID POLYMERIC BACKING SHEET, SUCH AS A FLEXIBLE POLYVINYL CHLORIDE OR A NONWOVEN POLYPROPYLENE SHEET TO WHICH FIBERS HAVE BEEN SECURED TO SAID BACKING SHEET, THE FIBERS PROVIDING A FIBER FACE AND THE BACKING SHEET CONTAINING A FLAMERETARDANTT AMOUNT OF AN UNDECOMPOSED BLOWING AGENT, SUCH AS AZODICARBONAMIDE, WHEREBY ON EXPOSURE OF THE CARPET TO OPEN-FLAME OR HIGH TEMPERATURES, THE BLOWING AGENT PROVIDES, SUCH AS BY DECOMPOSITION, A FLAME-RETARDANT QUANTITY OF AN INERT GAS.
Inventors
- 👤 R Crowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/23; B; B32; B32B; B32B27/00; B32B27/12; B32B27/30; B32B27/304; B32B27/32; B32B5/00; B32B5/22; B32B5/24; B32B5/245; B32B5/26; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/48; D05; D05C; D05C17/00; D05C17/02; D05C17/023; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2327/00; B32B2327/06; B32B2471/00; B32B2471/02; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23943; Y10T428/23986
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |