Patent US3260857A successfully refreshed from Google Patents.
Patent US1577189A successfully refreshed from Google Patents.
US1577189A
Expired / Lapsed
US
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Gels for catalytic and adsorbent purposes
Assignee: Individual
•
Filing: 1924-05-24
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Granted: 1926-03-16
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Expires: 1944-05-24
Abstract
No abstract record available.
Inventors
- 👤 Walter A Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:17
CPC Classifications
B; B01; B01J; B01J21/00; B01J20/00; B01J20/02; B01J20/06; B01J21/06; B01J21/08; C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/16; B01J37/00; B01J37/02; B01J37/0201
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) | 1929-03-15 | 1929-09-14 | 1930-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-03-15 | 1933-09-14 | 1934-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-03-15 | 1937-09-14 | 1938-03-16 | $7700.00 | Window Closed / Lapsed |