Patent US3739340A successfully refreshed from Google Patents.
US3739340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic lock system
Assignee: Individual
•
Filing: 1971-07-28
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Granted: 1973-06-12
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Expires: 1991-07-28
Abstract
Abstract An electronic lock control circuit having a voltage source and means for charging a plurality of storage elements from said source. The storage elements are connected in series to a gating device. The combined voltage of all the storage elements is required to activate the gating means which, in turn, passes the activating energy for the lock.
Inventors
- 👤 C Moorefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:36
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00658; G07C9/00674; G07C9/0069
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
2 words
I claim:
Claim 2
Dependent Claim
21 words
The control circuit of claim 1 further comprising; switching means connected between said storage devices and ground for resetting said lock.
Claim 3
Dependent Claim
15 words
The control circuit of claim 1 wherein said gating means comprises a silicon controlled rectifier.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |