US2944867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording device
Assignee: Individual
•
Filing: 1956-03-01
•
Granted: 1960-07-12
•
Expires: 1976-03-01
Abstract
No abstract record available.
Inventors
- 👤 Gregory Richard Langton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:03
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2773733A
Cited
US2229696A
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US2447803A
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US2196194A
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US2195868A
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US2477062A
Cited
US2355514A
Cited
US2344497A
Cited
US2483408A
Cited
US2447839A
Cited
US2633401A
Cited
US2703268A
Cited
FR1041450A
Cited
US2713533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |