US3020800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic summation system
Assignee: Unisys Corp
•
Filing: 1957-12-26
•
Granted: 1962-02-13
•
Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Perry Edward Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
G; G06; G06K; G06K1/00; G06K1/14; G06K1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2186138A
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US2226167A
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US2337534A
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US2390439A
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GB624637A
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US2697649A
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US2783678A
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US2769922A
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US2944735A
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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) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |