Patent US2867767A successfully refreshed from Google Patents.
US2867767A
Expired / Lapsed
US
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Signal detectors
Assignee: IND RES ASSOCIATES Inc
•
Filing: 1955-06-06
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Granted: 1959-01-06
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Expires: 1975-06-06
Abstract
No abstract record available.
Inventors
- 👤 Clare D Mcgillem
- 👤 Robert E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:35
CPC Classifications
H; H03; H03K; H03K9/00; H03K9/06; H03D; H03D3/00; H03D3/02; H03D3/04; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2467777A
Cited
US2597870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |