US2818768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic equipment
Assignee: Individual
•
Filing: 1953-03-10
•
Granted: 1958-01-07
•
Expires: 1973-03-10
Abstract
No abstract record available.
Inventors
- 👤 Mervin J Updegraffi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:18
CPC Classifications
G; G03; G03B; G03B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2238762A
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US2266908A
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US2375213A
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US2381228A
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US2454422A
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US2574072A
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US2624252A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |