US2925315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrolein treatment of feathers
Assignee: Individual
•
Filing: 1957-04-23
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Granted: 1960-02-16
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Expires: 1977-04-23
Abstract
No abstract record available.
Inventors
- 👤 Varsenig Z Pasternak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:14
CPC Classifications
D; D06; D06M; D06M19/00; A; A41; A41G; A41G9/00; Y; Y10; Y10S; Y10S530/00; Y10S530/855
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
A METHOD OF TREATING LAND FOWL FEATHERS WITH ACROLEIN TO ENHANCE THEIR FILLING POWER, WHICH COMPRISES MODIFYING THE CYSTINE LINKAGE OF THE KERATIN OF SAID LAND FOWL FEATHERS BY SOAKING SAILD FEATHERS IN AN AQUEOUS ALKALINE SOLUTION, RINSING SAID FEATHERS, THEN IMMERSING THE FEATHERS, PRIOR TO THE ACROLEIN TREATMENT, FOR ABOUT 15 MINUTES IN A FERROUS AMMONIUM SULFATE SOLUTION, THE FERROUS AMMONIUM SULFATE CONTENTS OF SAID SOLUTION BEING OF SUFFICIENT STRENGTH TO EXERT A CATALYTIC EFFECT DURING THE SUBSEQUENT ACROLEIN TREATMENT, THEN WITHOUT RINSING THE FEATHERS TRANSFERRING THEM TO AN ABOUT 6% AQUEOUS ACROLEIN SOLUTION CONTAINING A CATALYTIC AMOUNT OF AN OXIDIZING PEROXIDE CATALYST, WHEREBY SAID ACROLEIN IS AT LEAST PARTLY POLYMERIZED IN SITU, AND KEEPING THE FEATHERS IN THE BATH FOR ABOUT 180 MINUTES AT A PH OF ABOUT 4.5 AND A TEMPERATURE OF ABOUT 35*-46*C., THEN RINSING THE FEATHERS AND DRYING THEM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |