Patent US1922868A successfully refreshed from Google Patents.
US2661815A
Expired / Lapsed
US
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Chart drive mechanism
Assignee: ROCKWELL REGISTER Corp
•
Filing: 1949-04-22
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Granted: 1953-12-08
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Expires: 1969-04-22
Abstract
No abstract record available.
Inventors
- 👤 John B Mcgay
- 👤 George E Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:27
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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FR720656A
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US1909073A
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US2102268A
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US2497079A
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US2393671A
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US2531138A
Cited
US2543032A
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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) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |