US3649433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parallel strand reinforced cellular floor covering
Assignee: Armstrong World Industries Inc
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Filing: 1970-07-09
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Granted: 1972-03-14
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Expires: 1990-07-09
Abstract
Abstract A FLOOR STRUCTURE IS MADE WITH A VINYL WEARING SURFACE ADHESIVELY BONDED TO A FOAMED PLASTIC BACKING. BETWEEN THESE TWO LAYERS THERE IS PLACED A REINFORCING LAYER OF PARALLEL STRANDS OF GLASS FIBER.
Inventors
- 👤 Frank G Drout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:18
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/065; D; D06; D06N; D06N7/00; D06N7/0005; D06N7/0039; B32B27/30; B32B27/304; B32B5/00; B32B5/18; B32B7/00; B32B7/04; B32B7/12; D06N7/0047; D06N7/0049; F; F23; F23G; F23G5/00; F23G5/08; F23G5/085; B32B2262/00; B32B2262/10; B32B2262/101; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0235; B32B2307/00; B32B2307/70; B32B2307/732; B32B2307/734; B32B2471/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249946; Y10T428/31504; Y10T428/31855; Y10T428/31935
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |