US1873876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling temperatures in chemical reactions
Assignee: Barrett Co Inc
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Filing: 1923-02-26
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Granted: 1932-08-23
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Expires: 1943-02-26
Abstract
No abstract record available.
Inventors
- 👤 Charles R Downs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:50
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; B01J8/00; B01J8/02; B01J8/0285; F; F28; F28D; F28D15/00; F28D15/02; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00123; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00078
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) | 1935-08-23 | 1936-02-22 | 1936-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-23 | 1940-02-22 | 1940-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-23 | 1944-02-22 | 1944-08-23 | $7700.00 | Window Closed / Lapsed |