US2604940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time and period indicating device
Assignee: Individual
•
Filing: 1950-09-06
•
Granted: 1952-07-29
•
Expires: 1970-09-06
Abstract
No abstract record available.
Inventors
- 👤 Heptinstall John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:12
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/20; G04B19/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1848810A
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US2543946A
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US1414910A
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US2325312A
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US1181306A
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US1814679A
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US1795498A
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US2056690A
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US2246538A
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US2445809A
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US2533638A
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US2553972A
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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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |