US3443541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic carpet backing
Assignee: Celanese Canada Inc
•
Filing: 1965-10-20
•
Granted: 1969-05-13
•
Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Sohinder Nath Chopra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:19
CPC Classifications
D; D03; D03D; D03D15/00; D03D15/20; D03D15/283; D03D15/40; D03D15/41; D03D15/44; D03D15/46; D03D15/50; D03D15/573; D03D27/00; D05; D05C; D05C17/00; D05C17/02; D05C17/023; D10; D10B; D10B2321/00; D10B2321/02; D10B2321/022; D10B2503/00; D10B2503/04; D10B2503/041; D10B2503/042; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23993
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2723683A
Cited
US2715309A
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US3106507A
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US3152380A
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US3110905A
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US3317366A
Cited
US3286322A
Cited
US3262257A
Cited
US3359934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |