US2821456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing the filling power, etc., of landfowl feathers with magnesium silicofluoride and products produced thereby
Assignee: Individual
•
Filing: 1956-02-16
•
Granted: 1958-01-28
•
Expires: 1976-02-16
Abstract
No abstract record available.
Inventors
- 👤 Edward R Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:22
CPC Classifications
D; D06; D06M; D06M19/00; Y; Y10; Y10S; Y10S530/00; Y10S530/855; Y10S8/00; Y10S8/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD OF TREATING SOILED LANDFOWL FEATHERS TO ENHANCE THEIR FILLING POWER AND MAKE THEN AN ACCEPTABLE SUBSTITUTE FOR WATERFOWL FEATHERS WHICH COMPRISES IMMERSING THE SOILED LANDFOWL FEATHERS IN A SOLUTION CONSISTING OF MAGNESIUM SILICOFLUORIDE IN WATER AT A CONCENTRATION OF 0.75% TO 1.7% BY WEIGHT, WITH THE PH RANGING FROM 2 TO 3, THE SOLUTION BEING HEATED IN THE RANGE OF 55*C. TO 100*C.; STIRRING THE MIXTURE; CONTINUING THE IMMERSION UNTIL THE FILLING POWER OF THE FEATHERS IS INCREASED AND THE FEATHERS BECOME CLEANSED, PRESERVED, MOTHPROOFED, STIFFENED AND WATER REPELLENT; REMOVING THE LANDFOWL FEATHERS AND WASHING THEM WITH WATER TO REMOVE UNCOMBINED AND NON-ABSORBED MAGNESIUM SILICOFLUORIDE DIRT AND FOREIGN MATTER; AND DRYING AND FLUFFING THE LANDFOWL FEATHERS.
Claim 2
Independent Claim
118 words
A METHOD OF TREATING SOILED LANDFOWL FEATHERS TO ENHANCE THEIR FILLING POWER AND MAKE THEN AN ACCEPTABLE SUBSTITUTE FOR WATERFOWL FEATHERS WHICH COMPRISES IMMERSING THE SOILED LANDFOWL FEATHERS IN A SOLUTION CONSISTING OF MAGNESIUM SILICOFLUORIDE IN WATER AT A CONCENTRATION OF 0.75% TO 1.7% BY WEIGHT, WITH THE PH RANGING FROM 2 TO 3, THE SOLUTION BEING HEATED IN THE RANGE OF 55*C. TO 100*C.; STIRRING THE MIXTURE; CONTINUING THE IMMERSION UNTIL THE FILLING POWER OF THE FEATHERS IS INCREASED AND THE FEATHERS BECOME CLEANSED, PRESERVED, MOTHPROOFED, STIFFENED AND WATER REPELLENT; REMOVING THE LANDFOWL FEATHERS AND WASHING THEM WITH WATER TO REMOVE UNCOMBINED AND NON-ABSORBED MAGNESIUM SILICOFLUORIDE DIRT AND FOREIGN MATTER; AND DRYING AND FLUFFING THE LANDFOWL FEATHERS.
References Cited (Backward Citations)
US2091075A
Cited
US2127252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |