Patent US2640237A successfully refreshed from Google Patents.
US2640237A
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Detachable key ring
Assignee: Hickok Manufacturing Co Inc
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Filing: 1949-09-15
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Granted: 1953-06-02
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Expires: 1969-09-15
Abstract
No abstract record available.
Inventors
- 👤 Vaisey Samuel John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:19
CPC Classifications
A; A44; A44B; A44B15/00; F; F16; F16B; F16B45/00; F16B45/04; F16B45/049; Y; Y10; Y10T; Y10T24/00; Y10T24/34; Y10T24/3484; Y10T24/3485; Y10T24/3487; Y10T24/3489; Y10T24/45; Y10T24/45225; Y10T24/45602; Y10T24/45775; Y10T24/45785; Y10T24/45791
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |