US3488458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature slide-type telephone switchhook
Assignee: AT&T Inc
•
Filing: 1967-01-09
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Granted: 1970-01-06
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Expires: 1987-01-09
Abstract
No abstract record available.
Inventors
- 👤 Warren R Tolman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:27
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H04; H04M; H04M1/00; H04M1/02; H04M1/04; H04M1/06; H04M1/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49105
Claims Analysis
Total Claims: 0
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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) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |