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US3141160A
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US
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Electro-mechanical signalling apparatus
Assignee: HP Inc
•
Filing: 1962-09-28
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Granted: 1964-07-14
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Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 Dexter C Hartke
- 👤 Jerome M Idelsohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:26
CPC Classifications
H; H03; H03M; H03M1/00; G; G04; G04G; G04G9/00; G04G9/0005; G04G9/0011; H03M1/12; H03M1/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2958861A
Cited
US2993200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |