Patent US2600975A successfully refreshed from Google Patents.
US2600975A
Expired / Lapsed
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Unitary condenser lens assembly mounting means for projectors
Assignee: American Optical Corp
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Filing: 1951-02-10
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Granted: 1952-06-17
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Expires: 1971-02-10
Abstract
No abstract record available.
Inventors
- 👤 David I Critoph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:10
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US859215A
Cited
US870535A
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US1338818A
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GB228704A
Cited
US2169010A
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US2231743A
Cited
US2380613A
Cited
US2477107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |