US2937918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile treatment of feathers
Assignee: Individual
•
Filing: 1957-04-23
•
Granted: 1960-05-24
•
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
2026-11-06 20:01
CPC Classifications
D; D06; D06M; D06M19/00; Y; Y10; Y10S; Y10S530/00; Y10S530/855
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD OF TREATING LAND FOWL FEATHERS TO ENHANCE THEIR FILLING POWER, COMPRISING FIRST SOAKING SAID LAND FOWL FEATHERS IN A DILUTE MILDLY ALKALINE AQUEOUS SOLUTION OF HYDRAZINE, THEN RINSING SAID FEATHERS, THEN IMMERSING SAID FEATHERS IN AN AQUEOUS SOLUTION OF ACRYLONITRILE, SAID SOLUTION HAVING A PH OF ABOUT 6-11 AND A TEMPERATURE ABOVE ROOM TEMPERATURE, KEEPING SAID FEATHERS IN SAID ACRYLONITRILE SOLUTION UNTIL THEIR FILLING POWER IS INCREASED, THEN REMOVING THE FEATHERS FROM SAID SOLUTION, AND RINSING AND DRYING THEM.
Claim 2
Independent Claim
81 words
A METHOD OF TREATING LAND FOWL FEATHERS TO ENHANCE THEIR FILLING POWER, COMPRISING FIRST SOAKING SAID LAND FOWL FEATHERS IN A DILUTE MILDLY ALKALINE AQUEOUS SOLUTION OF HYDRAZINE, THEN RINSING SAID FEATHERS, THEN IMMERSING SAID FEATHERS IN AN AQUEOUS SOLUTION OF ACRYLONITRILE, SAID SOLUTION HAVING A PH OF ABOUT 6-11 AND A TEMPERATURE ABOVE ROOM TEMPERATURE, KEEPING SAID FEATHERS IN SAID ACRYLONITRILE SOLUTION UNTIL THEIR FILLING POWER IS INCREASED, THEN REMOVING THE FEATHERS FROM SAID SOLUTION, AND RINSING AND DRYING THEM.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |