Patent US2780132A successfully refreshed from Google Patents.
US2780132A
Expired / Lapsed
US
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Optical comparator
Assignee: Thales Optronics Ltd
•
Filing: 1953-03-10
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Granted: 1957-02-05
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Expires: 1973-03-10
Abstract
No abstract record available.
Inventors
- 👤 Dickson John Home
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:59
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G02; G02B; G02B23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319292A
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US858213A
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GB191121086A
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US1116069A
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US1723623A
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GB519940A
Cited
US2404770A
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US2536718A
Cited
GB645619A
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US2621555A
Cited
US2555402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |