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US2798533A
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Assignee: WINFIELD Co Inc
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Filing: 1953-03-20
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Granted: 1957-07-09
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Expires: 1973-03-20
Abstract
No abstract record available.
Inventors
- 👤 Richard J Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:20
CPC Classifications
A; A61; A61H; A61H3/00; A61H2201/00; A61H2201/16; A61H2201/1602; A61H2201/1628; A61H2201/1633
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1087928A
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US1163263A
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US1448783A
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US1572378A
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US2305249A
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US2433969A
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US2430235A
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US2627904A
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US2708473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |