Patent US2537260A successfully refreshed from Google Patents.
US2537260A
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US
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Assignee: WEBSTERCHICAGO Corp
•
Filing: 1947-03-10
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Granted: 1951-01-09
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Expires: 1967-03-10
Abstract
No abstract record available.
Inventors
- 👤 Colin B Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:05
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/22; G11B25/00; G11B25/08; G11B5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1215364A
Cited
US1144673A
Cited
US1210955A
Cited
DE329804C
Cited
US1943304A
Cited
US2369017A
Cited
US2438222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |