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US2544251A
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Assignee: Individual
•
Filing: 1944-06-24
•
Granted: 1951-03-06
•
Expires: 1964-06-24
Abstract
No abstract record available.
Inventors
- 👤 William E Block
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:04
CPC Classifications
G; G06; G06K; G06K21/00; G06K21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1544172A
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GB225069A
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US1739087A
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US1748692A
Cited
GB347399A
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US2270896A
Cited
GB522386A
Cited
US2190707A
Cited
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US2359705A
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US2315860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |