US2649081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charge forming device
Assignee: Individual
•
Filing: 1949-08-01
•
Granted: 1953-08-18
•
Expires: 1969-08-01
Abstract
No abstract record available.
Inventors
- 👤 Martienssen Laurence Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:25
CPC Classifications
F; F02; F02M; F02M25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1530464A
Cited
US1803097A
Cited
US2073887A
Cited
US2141029A
Cited
US2430852A
Cited
US2470366A
Cited
US2445479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |