US1720855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making wall board
Assignee: Gypsum Engineering & Manufacturing Co
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Filing: 1924-02-18
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Granted: 1929-07-16
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Expires: 1944-02-18
Abstract
No abstract record available.
Inventors
- 👤 Payne Caleb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:51
CPC Classifications
B; B28; B28B; B28B19/00; B28B19/0092; B28B23/00; B28B5/00; B28B5/02; B28B5/026; B28B5/027
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) | 1932-07-15 | 1933-01-14 | 1933-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-15 | 1937-01-14 | 1937-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-15 | 1941-01-14 | 1941-07-16 | $7700.00 | Window Closed / Lapsed |