US2598950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording apparatus
Assignee: Individual
•
Filing: 1945-09-29
•
Granted: 1952-06-03
•
Expires: 1965-09-29
Abstract
No abstract record available.
Inventors
- 👤 Walker Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:18
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1974153A
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US1919607A
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GB423624A
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US2043354A
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US2153317A
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US2262032A
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US2097142A
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US2229480A
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US2346883A
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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) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |