Patent US3309905A successfully refreshed from Google Patents.
US3309905A
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US
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Key plate
Assignee: PRINCE GARDNER CO Inc
•
Filing: 1964-11-20
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Granted: 1967-03-21
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Expires: 1984-11-20
Abstract
No abstract record available.
Inventors
- 👤 Paul C Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:29
CPC Classifications
A; A45; A45C; A45C11/00; A45C11/32; A45C11/323; Y; Y10; Y10T; Y10T70/00; Y10T70/80; Y10T70/8432; Y10T70/8676; Y10T70/8784
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2038070A
Cited
US2201850A
Cited
US2575472A
Cited
US3006182A
Cited
US3008323A
Cited
US3132504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |