US2434531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed recording system
Assignee: Standard Oil Development Co
•
Filing: 1944-04-21
•
Granted: 1948-01-13
•
Expires: 1964-04-21
Abstract
No abstract record available.
Inventors
- 👤 James A Wilson
- 👤 John J Heigl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:03
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1850909A
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US1926824A
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US1979964A
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FR764846A
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US2193606A
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US2228883A
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US2230502A
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US2215806A
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US2348711A
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US2351081A
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US2388105A
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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) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |