Patent US2892933A successfully refreshed from Google Patents.
US2892933A
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US
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Assignee: Underwood Corp
•
Filing: 1953-12-16
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Granted: 1959-06-30
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Expires: 1973-12-16
Abstract
No abstract record available.
Inventors
- 👤 Robert F Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/64; H03K23/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2486491A
Cited
US2521774A
Cited
US2629827A
Cited
US2558447A
Cited
US2750499A
Cited
US2766379A
Cited
US2674733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-29 | 1962-12-29 | 1963-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-29 | 1966-12-29 | 1967-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-29 | 1970-12-29 | 1971-06-30 | $7700.00 | Window Closed / Lapsed |