US3499993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone answering device
Assignee: PHONEMASTER Inc
•
Filing: 1965-09-28
•
Granted: 1970-03-10
•
Expires: 1985-09-28
Abstract
No abstract record available.
Inventors
- 👤 James R Owen
- 👤 Henry Replin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:26
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64; H04M1/65; H04M1/652
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2703821A
Cited
US2937237A
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US2935566A
Cited
US3136856A
Cited
US3127474A
Cited
US3041417A
Cited
US3134089A
Cited
US3156771A
Cited
US3135831A
Cited
US3360613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |