Patent US2500056A successfully refreshed from Google Patents.
US3392558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binary coded electronic lock and key
Assignee: Individual
•
Filing: 1965-10-23
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Granted: 1968-07-16
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Robert A Hedin
- 👤 Alfiero F Balzano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:51
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00706; Y; Y10; Y10T; Y10T70/00; Y10T70/80; Y10T70/8027; Y10T70/8054; Y10T70/8081
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) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |