Patent US3515992A successfully refreshed from Google Patents.
US3515992A
Expired / Lapsed
US
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Automatic alarm detector
Assignee: U S Holding Co Inc
•
Filing: 1967-06-09
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Granted: 1970-06-02
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Expires: 1987-06-09
Abstract
No abstract record available.
Inventors
- 👤 Benjamin Rutledge
- 👤 Timothy J Keough
- 👤 Charles James Kalensky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:41
CPC Classifications
H; H04; H04L; H04L15/00; H04L15/24; H04L15/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2116990A
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US2235804A
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US2564692A
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US2552174A
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US2533765A
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US2655596A
Cited
US2834003A
Cited
US2761060A
Cited
US3000002A
Cited
US3293606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |