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Patent US2016135A successfully refreshed from Google Patents.
US2016135A
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Method of making a catalyst
Assignee: General Chemical Corp
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Filing: 1931-05-27
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Granted: 1935-10-01
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Expires: 1951-05-27
Abstract
No abstract record available.
Inventors
- 👤 Cummings Tom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:56
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/78
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) | 1938-09-30 | 1939-04-01 | 1939-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-09-30 | 1943-04-01 | 1943-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-09-30 | 1947-04-01 | 1947-10-01 | $7700.00 | Window Closed / Lapsed |