US3553720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable circuit timer with improved contact securing means
Assignee: Duracell Inc USA
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Filing: 1969-12-22
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Granted: 1971-01-05
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Expires: 1989-12-22
Abstract
Abstract ELECTRICAL CONTACT BLADE RETAINING MEANS ARE FORMED AS INTEGRAL PARTS OF THE TIMER HOUSING. THE RETAINING MEANS IN CONJUNCTION WITH THE TIMER CAM PROGRAMMING MEANS PERMITS DIFFERENT SWITCHING CIRCUITS TO BE READILY OBTAINED.
Inventors
- 👤 William Ray Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:09
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/24; H01H1/26; G; G04; G04F; G04F3/00; G04F3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |