US2756931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card filing
Assignee: Individual
•
Filing: 1950-10-21
•
Granted: 1956-07-31
•
Expires: 1970-10-21
Abstract
No abstract record available.
Inventors
- 👤 Jacob H Drillick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:44
CPC Classifications
G; G06; G06K; G06K21/00; G06K21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1351692A
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US1501439A
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US1744373A
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US1821459A
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FR770923A
Cited
US2231186A
Cited
US2260748A
Cited
US2379943A
Cited
US2483035A
Cited
US2558577A
Cited
US2541247A
Cited
US2605965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |