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US2651523A
Expired / Lapsed
US
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Assignee: WEBSTER CHICAGO CORP
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Filing: 1951-02-28
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Granted: 1953-09-08
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Expires: 1971-02-28
Abstract
No abstract record available.
Inventors
- 👤 Colin B Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:47
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/08; G11B17/12; G11B17/14; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5196
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |