US3460121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signalling and communication system
Assignee: BERKELEY SCIENT LAB
•
Filing: 1965-10-24
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Granted: 1969-08-05
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Willard H Wattenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:53
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/54; H04B3/544; H04B2203/00; H04B2203/54; H04B2203/5404; H04B2203/5416; H04B2203/5425; H04B2203/5429; H04B2203/5441; H04B2203/5445; H04B2203/5458; H04B2203/5462; H04B2203/5491
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1660930A
Cited
US2206702A
Cited
US2587213A
Cited
US3188623A
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US3150359A
Cited
US3287722A
Cited
US3283316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |