Patent US1691280A successfully refreshed from Google Patents.
US1691280A
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US
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Method of making porous material
Assignee: Individual
•
Filing: 1926-07-26
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Granted: 1928-11-13
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Expires: 1946-07-26
Abstract
No abstract record available.
Inventors
- 👤 Granville Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/50; C; C04; C04B; C04B38/00; Y; Y10; Y10S; Y10S264/00; Y10S264/43; Y10S264/63; Y10S264/78
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) | 1931-11-13 | 1932-05-14 | 1932-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-11-13 | 1936-05-14 | 1936-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-11-13 | 1940-05-14 | 1940-11-13 | $7700.00 | Window Closed / Lapsed |