Patent US2169955A successfully refreshed from Google Patents.
US2169955A
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US
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Treatment of casein fibers
Assignee: Akzona Inc
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Filing: 1938-04-22
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Granted: 1939-08-15
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Expires: 1958-04-22
Abstract
No abstract record available.
Inventors
- 👤 Koch Theodoor
- 👤 Kroon Henricus Anthonius V Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:37
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D01; D01F; D01F4/00; D06M11/00; D06M11/58; D06M11/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-08-14 | 1943-02-13 | 1943-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-14 | 1947-02-13 | 1947-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-14 | 1951-02-13 | 1951-08-15 | $7700.00 | Window Closed / Lapsed |