US2559848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of protein solutions
Assignee: Eastman Kodak Co
•
Filing: 1947-05-23
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Granted: 1951-07-10
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Expires: 1967-05-23
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:57
CPC Classifications
D; D01; D01F; D01F4/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
THE PROCESS OF PREPARING PROTEIN SOLUTIONS OF HIGH CLARITY AND STABILITY AND ADAPTED FOR USE IN THE MANUFACTURE OF FILAMENTS WHICH COMPRISES INCORPORATING A PROTEIN INTO A LIQUID CONSISTING ESSENTIALLY OF AN AQUEOUS ACID-SOLVENT ESSENTIALLY COMPRISED OF AT LEAST ONE ALIPHATIC MONOCARBOXYLIC ACID OF 1-2 CARBON ATOMS CONTAINED IN 5-25% WATER, THE PROCESS BEING CHARACTERIZED IN THAT THE AQUEOUS ACID-SOLVENT AFORESAID IS HEATED TO BETWEEN 60-80* C. WHILE SLOWLY ADDING THE PROTEIN THERETO.
References Cited (Backward Citations)
GB190620548A
Cited
US883995A
Cited
US1023022A
Cited
GB191216616A
Cited
GB111171A
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US1245984A
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GB419675A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |