US2839256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording apparatus
Assignee: IND ANALYZER CORP
•
Filing: 1955-02-02
•
Granted: 1958-06-17
•
Expires: 1975-02-02
Abstract
No abstract record available.
Inventors
- 👤 Boyan Edwin Arthur
- 👤 Frederick C Geiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:41
CPC Classifications
B; B41; B41F; B41F17/00; B41F17/02; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4501; Y10T83/4513
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US489787A
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US1894065A
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US2197112A
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US2298339A
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US2492900A
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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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |