US2701178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permonosulfuric acid treatment of wool, for shrink resistance
Assignee: STEVENSON (DYERS) Ltd
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Filing: 1951-05-24
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Granted: 1955-02-01
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Expires: 1971-05-24
Abstract
No abstract record available.
Inventors
- 👤 Fell Eric Tom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:28
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF TREATING MATERIALS COMPOSED AT LEAST PARTLY OF WOOL IN ORDER TO REDUCE THE TENDENCY OF THE WOOL TO FELT AND SHRINK WHEN WASHED IN AQUEOUS LIQUORS, COMPRISING TREATING SUCH MATERIALS WITH A SOLUTION CONTAINING A SUBSTANCE SELCTED FROM THE GROUP CONSISTING OF PERMONOSULPHURIC ACID AND SALTS OF PERMONOSULPHURIC ACID. SAID SOLUTION HAVING A PH IN THE RANGES BELOW PH 2 AND BETWEEN PH ABOVE 7 AND NOT OVER ABOUT 11.2, SAID SOLUTION CONTAINING NOT LESS THAN 10% BY WEIGHT OF SULPHURIC ACID AT THE PH RANGE BELOW 2.
Claim 2
Independent Claim
91 words
A METHOD OF TREATING MATERIALS COMPOSED AT LEAST PARTLY OF WOOL IN ORDER TO REDUCE THE TENDENCY OF THE WOOL TO FELT AND SHRINK WHEN WASHED IN AQUEOUS LIQUORS, COMPRISING TREATING SUCH MATERIALS WITH A SOLUTION CONTAINING A SUBSTANCE SELCTED FROM THE GROUP CONSISTING OF PERMONOSULPHURIC ACID AND SALTS OF PERMONOSULPHURIC ACID. SAID SOLUTION HAVING A PH IN THE RANGES BELOW PH 2 AND BETWEEN PH ABOVE 7 AND NOT OVER ABOUT 11.2, SAID SOLUTION CONTAINING NOT LESS THAN 10% BY WEIGHT OF SULPHURIC ACID AT THE PH RANGE BELOW 2.
References Cited (Backward Citations)
US1106107A
Cited
DE561521C
Cited
FR784828A
Cited
GB451026A
Cited
FR798566A
Cited
GB451115A
Cited
US2173040A
Cited
US2369399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |