US2487314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indexing device for optical projection comparators
Assignee: International Business Machines Corp
•
Filing: 1946-11-27
•
Granted: 1949-11-08
•
Expires: 1966-11-27
Abstract
No abstract record available.
Inventors
- 👤 Roger E Coles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:22
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1377068A
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US1434131A
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US1421042A
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US1589349A
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US1732730A
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US1974606A
Cited
US2035780A
Cited
US2222165A
Cited
US2422611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |