Patent US2475697A successfully refreshed from Google Patents.
US2475697A
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US
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Treatment of collagen strands
Assignee: Wyeth Holdings LLC
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Filing: 1946-04-19
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Granted: 1949-07-12
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Expires: 1966-04-19
Abstract
No abstract record available.
Inventors
- 👤 Cresswell Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:40
CPC Classifications
D; D01; D01F; D01F4/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2039262A
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US2120851A
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US2046320A
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US2103163A
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US2338915A
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US2290789A
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US2266672A
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US2404665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |