US1872879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant pressure and temperature distillation
Assignee: Doherty Research Co
•
Filing: 1923-07-30
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Granted: 1932-08-23
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Expires: 1943-07-30
Abstract
No abstract record available.
Inventors
- 👤 David G Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:22
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14
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 |