US1875926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrying out chemical reactions in which reaction gases are circulated
Assignee: Imperial Chemical Industries Ltd
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Filing: 1928-03-21
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Granted: 1932-09-06
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Expires: 1948-03-21
Abstract
No abstract record available.
Inventors
- 👤 Hughes Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:07
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0476; B; B01; B01J; B01J8/00; B01J8/02; B01J2208/00; B01J2208/00008; B01J2208/00539; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1935-09-06 | 1936-03-07 | 1936-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-06 | 1940-03-07 | 1940-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-06 | 1944-03-07 | 1944-09-06 | $7700.00 | Window Closed / Lapsed |