US2450751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant flow pump
Assignee: Eastman Kodak Co
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Filing: 1946-03-07
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Granted: 1948-10-05
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Expires: 1966-03-07
Abstract
No abstract record available.
Inventors
- 👤 Calvin A Elwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:24
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/10; F04B43/107; F04B11/00; F04B53/00; F04B53/10; F04B53/1037; F04B53/1047; F04B53/106; F04B53/1062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |