US2940505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of plaster board
Assignee: BPB Ltd
•
Filing: 1953-10-12
•
Granted: 1960-06-14
•
Expires: 1973-10-12
Abstract
No abstract record available.
Inventors
- 👤 Brothers Nellie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:56
CPC Classifications
B; B28; B28B; B28B19/00; B28B19/0092; D; D21; D21J; D21J1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1459264A
Cited
US1428827A
Cited
US2088813A
Cited
US2213249A
Cited
US2051452A
Cited
US2346999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |