US2374867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1943-11-03
•
Granted: 1945-05-01
•
Expires: 1963-11-03
Abstract
No abstract record available.
Inventors
- 👤 Knapp Franklin Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:11
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/0404; F04B1/0408; F04B1/0443; F04B1/053; F04B53/00; F04B53/10; F04B53/1037
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) | 1948-04-30 | 1948-10-30 | 1949-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-30 | 1952-10-30 | 1953-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-30 | 1956-10-30 | 1957-05-01 | $7700.00 | Window Closed / Lapsed |