US2453538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant pressure pump
Assignee: General Electric Co
•
Filing: 1947-10-04
•
Granted: 1948-11-09
•
Expires: 1967-10-04
Abstract
No abstract record available.
Inventors
- 👤 William T Rauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/10; F04B1/107; F04B1/1071; F04B1/06; F04B1/07; F04B49/00; F04B49/08; F04B49/12; F04B49/123; F04B49/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1325434A
Cited
US1965937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-09 | 1952-05-10 | 1952-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-09 | 1956-05-10 | 1956-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-09 | 1960-05-10 | 1960-11-09 | $7700.00 | Window Closed / Lapsed |