US3472965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time-tone data transmission system
Assignee: SEISCOR Inc
•
Filing: 1966-04-11
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Granted: 1969-10-14
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Expires: 1986-04-11
Abstract
No abstract record available.
Inventors
- 👤 James H Blossom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:54
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/12; G08C19/14; H; H04; H04M; H04M11/00; H04M11/007
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) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |