US1995756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant speed variable delivery rotary pump
Assignee: Individual
•
Filing: 1933-10-23
•
Granted: 1935-03-26
•
Expires: 1953-10-23
Abstract
No abstract record available.
Inventors
- 👤 George H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:50
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/10; F04B1/0404; F04B1/0439; F04B1/0443; F04B1/107; F04B1/1071
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) | 1938-03-25 | 1938-09-24 | 1939-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-25 | 1942-09-24 | 1943-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-25 | 1946-09-24 | 1947-03-26 | $7700.00 | Window Closed / Lapsed |