Patent US3142052A successfully refreshed from Google Patents.
US3142052A
Expired / Lapsed
US
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Emergency signalling device
Assignee: Individual
•
Filing: 1962-04-30
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Granted: 1964-07-21
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Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Norman E Tambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:48
CPC Classifications
F; F21; F21L; F21L13/00; F21L13/06; F21L2/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2803811A
Cited
US1186961A
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US2017849A
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US2490309A
Cited
US2597705A
Cited
US2644152A
Cited
US2620390A
Cited
US2707781A
Cited
US2846675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |