US3531586A
Expired / Lapsed
US
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Assignee: R & R Research Ltd
•
Filing: 1965-04-19
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Granted: 1970-09-29
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Expires: 1985-04-19
Abstract
No abstract record available.
Inventors
- 👤 Patrick Bass
- 👤 Peter John Waller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:09
CPC Classifications
G; G07; G07F; G07F17/00; G07F17/28; H; H03; H03F; H03F3/00; H03F3/04; H03F3/10; H03F3/12; H04; H04N; H04N7/00; H04N7/06; H04N7/16; H04N7/162; H04N7/163; H04N7/164
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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |