US3533871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonwoven tufted fabric by crimping
Assignee: Armstrong World Industries Inc
•
Filing: 1968-04-10
•
Granted: 1970-10-13
•
Expires: 1988-04-10
Abstract
No abstract record available.
Inventors
- 👤 David T Zentmyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:15
CPC Classifications
D; D04; D04H; D04H11/00; D04H11/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/1025; Y10T428/00; Y10T428/23907; Y10T428/23986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2644780A
Cited
US2896692A
Cited
US3035329A
Cited
US3034942A
Cited
US3330708A
Cited
US3142604A
Cited
US3411966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |