US2287780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long draft apron
Assignee: Armstrong World Industries Inc
•
Filing: 1939-11-21
•
Granted: 1942-06-30
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Expires: 1959-11-21
Abstract
No abstract record available.
Inventors
- 👤 Frank H Carman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:34
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/70; D01H5/86
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-06-29 | 1945-12-29 | 1946-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-06-29 | 1949-12-29 | 1950-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-06-29 | 1953-12-29 | 1954-06-30 | $7700.00 | Window Closed / Lapsed |