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US2746349A
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US
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Projection optical objectives
Assignee: Taylor Taylor and Hobson Ltd
•
Filing: 1952-05-26
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Granted: 1956-05-22
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Expires: 1972-05-26
Abstract
No abstract record available.
Inventors
- 👤 Coleman Kenneth Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:21
CPC Classifications
G; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US583336A
Cited
GB157040A
Cited
US1945977A
Cited
US2256102A
Cited
US2354614A
Cited
US2430549A
Cited
GB608583A
Cited
US2481639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |