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US2608931A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1946-03-01
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Granted: 1952-09-02
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Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Charles C Lauritsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:30
CPC Classifications
F; F42; F42B; F42B39/00; F42B39/20; F42C; F42C15/00; F42C15/28; F42C15/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2145507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |