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Patent US2536574A successfully refreshed from Google Patents.
US2536574A
Expired / Lapsed
US
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Filing apparatus
Assignee: Wheeldex Manufacturing Co Inc
•
Filing: 1943-08-25
•
Granted: 1951-01-02
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Expires: 1963-08-25
Abstract
No abstract record available.
Inventors
- 👤 Richard P Scholfield
- 👤 Robert E Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:33
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US362084A
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US703853A
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US959943A
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US1222712A
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US1356486A
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FR652184A
Cited
US1976249A
Cited
US2046655A
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US1985406A
Cited
US2168323A
Cited
US2205932A
Cited
US2213825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |