Patent US2489462A successfully refreshed from Google Patents.
US2489462A
Expired / Lapsed
US
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Work holding staging fixture for optical projecting comparators
Assignee: Individual
•
Filing: 1948-01-30
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Granted: 1949-11-29
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Expires: 1968-01-30
Abstract
No abstract record available.
Inventors
- 👤 Bernard N Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:01
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1737579A
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US1480390A
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US1589349A
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US1703933A
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US1715813A
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US1745537A
Cited
US1745523A
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US2414867A
Cited
US2400501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |