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US2639964A
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Multiple diagram-frame recorder
Assignee: Individual
•
Filing: 1949-10-10
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Granted: 1953-05-26
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Expires: 1969-10-10
Abstract
No abstract record available.
Inventors
- 👤 Keinath George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:53
CPC Classifications
G; G01; G01D; G01D9/00; G01D9/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2394990A
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US2276423A
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US2303472A
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US2306391A
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US2387760A
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US2485730A
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US2437242A
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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) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |