Patent US4934963A successfully refreshed from Google Patents.
US2985014A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1958-06-20
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Granted: 1961-05-23
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Expires: 1978-06-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles H Doersam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:17
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/02; G01P5/04; G01P13/00; G01P13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR961641A
Cited
US2098099A
Cited
US2375227A
Cited
US2613536A
Cited
GB631973A
Cited
US2543020A
Cited
US2665583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |