US2771552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discriminating detector
Assignee: Individual
•
Filing: 1951-05-09
•
Granted: 1956-11-20
•
Expires: 1971-05-09
Abstract
No abstract record available.
Inventors
- 👤 Donald W Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:43
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA465525A
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US1733414A
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US2116814A
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US2227415A
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US2256078A
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US2402083A
Cited
US2429762A
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US2589236A
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US2456915A
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US2504341A
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US2513803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |