Patent US1997293A successfully refreshed from Google Patents.
US1997293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural material and method for making the same
Assignee: SCHUMACHER WALL BOARD Corp
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Filing: 1934-06-08
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Granted: 1935-04-09
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Expires: 1954-06-08
Abstract
No abstract record available.
Inventors
- 👤 Albert H Brunner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:33
CPC Classifications
B; B28; B28B; B28B19/00; B28B19/0092; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24215; Y10T428/24231; Y10T428/24777
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) | 1938-04-08 | 1938-10-08 | 1939-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-08 | 1942-10-08 | 1943-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-08 | 1946-10-08 | 1947-04-09 | $7700.00 | Window Closed / Lapsed |