US2923596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of rendering wool unshrinkable and non-felting
Assignee: MINISTRY OF AGRICULTURE
•
Filing: 1956-01-04
•
Granted: 1960-02-02
•
Expires: 1976-01-04
Abstract
No abstract record available.
Inventors
- 👤 Levin Menachem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:49
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/07; D06M11/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR RENDERING WOOL SHRINKPROOF AND FELTPROOF COMPRISING IMMERSING THE WOOL IN AN AQUEOUS ACIDBROMATE SOLUTION CONTAINING BROMATE IONS IN AN AMOUNT OF 1.45 TO 6.25% AND A SUBSTANCE FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE-EARTH CHLORIDES IN AN AMOUNT OF FROM 20 TO 120% (CALCULATED AS CHLORIDE ION), AND A STRONG MINERAL ACID IN AN AMOUNT AT LEAST EQUIVALENT TO THAT OF THE BROMATE, ALL PERCENTAGES BEING BY WEIGHT OF AIR-DRY WOOL, AND LEAVING THE WOOL IMMERSED IN THE SOLUTION FOR THE TIME REQUIRED FOR THE DISAPPEARANCE FROM THE SOLUTION OF BROMATE ION IN AN AMOUNT OF ABOUT 1.3 TO 2.1% BY WEIGHT OF THE AIR-DRY WOOL, THE IRRETRIEVABLE BROMATE IONS BEING FROM 1.3 TO 1.7 PERCENT AND THE RETRIEVABLE SORBED BROMATE IONS BEING FROM 0 TO 0.4 PERCENT.
Claim 2
Dependent Claim
132 words
A PROCESS FOR RENDERING WOOL SHRINKPROOF AND FELTPROOF COMPRISING IMMERSING THE WOOL IN AN AQUEOUS ACIDBROMATE SOLUTION CONTAINING BROMATE IONS IN AN AMOUNT OF 1.45 TO 6.25% AND A SUBSTANCE FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE-EARTH CHLORIDES IN AN AMOUNT OF FROM 20 TO 120% (CALCULATED AS CHLORIDE ION), AND A STRONG MINERAL ACID IN AN AMOUNT AT LEAST EQUIVALENT TO THAT OF THE BROMATE, ALL PERCENTAGES BEING BY WEIGHT OF AIR-DRY WOOL, AND LEAVING THE WOOL IMMERSED IN THE SOLUTION FOR THE TIME REQUIRED FOR THE DISAPPEARANCE FROM THE SOLUTION OF BROMATE ION IN AN AMOUNT OF ABOUT 1.3 TO 2.1% BY WEIGHT OF THE AIR-DRY WOOL, THE IRRETRIEVABLE BROMATE IONS BEING FROM 1.3 TO 1.7 PERCENT AND THE RETRIEVABLE SORBED BROMATE IONS BEING FROM 0 TO 0.4 PERCENT.
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |