US1464845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing chemical reactions
Assignee: Barrett Co Inc
•
Filing: 1920-06-04
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Granted: 1923-08-14
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Expires: 1940-06-04
Abstract
No abstract record available.
Inventors
- 👤 Charles R Downs
- 👤 Charles G Stupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:13
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0446; B01J8/0476; B01J8/048; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00176; B01J2208/00194; B01J2208/00203; B01J2208/00212; B01J2208/00265; B01J2208/00274
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) | 1926-08-13 | 1927-02-12 | 1927-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-08-13 | 1931-02-12 | 1931-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-08-13 | 1935-02-12 | 1935-08-14 | $7700.00 | Window Closed / Lapsed |