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US3040642A
Expired / Lapsed
US
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Photographic apparatus
Assignee: Robertson Photo-Mechanix Inc
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Filing: 1959-06-12
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Granted: 1962-06-26
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Expires: 1979-06-12
Abstract
No abstract record available.
Inventors
- 👤 Keller Daniel Franklin
- 👤 Jr William Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:31
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/20; G03F7/2002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1331978A
Cited
US2435720A
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US2572450A
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US2630743A
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US2760418A
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US2786401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |