US2726133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Effect threads
Assignee: —
•
Filing: —
•
Granted: 1955-12-06
•
Expires: 1972-12-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:51
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/02; D06M14/06; D06M11/00; D06M11/51; D06M11/55; D06M2101/00; D06M2101/02; D06M2101/10; D06M2101/12; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR MODIFYING THE TINCTORIAL PROPERTIES OF PROTEINIC FIBRES, WHICH COMPRISES IMPREGNATING THE SAID FIBRES WITH AN ACID SOLUTION CONTAINING SULPHAMIC ACID AS EFFECTIVE RESIST-PRODUCING AGENT AND HAVING A PH WHICH IS LOWER THAN 6, AND THEN SUBJECTING THE IMPREGNATED FIBRES TO A HEAT TREATMENT AT 105 TO 175* C. UNTIL THERE IS AN INCREASE IN WEIGHT OF THE FIBRES OF ABOUT 6 TO ABOUT 10 PERCENT, WHEREBY THE RESULTANT FIBRES ARE RESERVED WITH RESPECT TO WOOL DYES OF THE ACID AND NEUTRAL DYEING TYPE.
Claim 2
Dependent Claim
86 words
A PROCESS FOR MODIFYING THE TINCTORIAL PROPERTIES OF PROTEINIC FIBRES, WHICH COMPRISES IMPREGNATING THE SAID FIBRES WITH AN ACID SOLUTION CONTAINING SULPHAMIC ACID AS EFFECTIVE RESIST-PRODUCING AGENT AND HAVING A PH WHICH IS LOWER THAN 6, AND THEN SUBJECTING THE IMPREGNATED FIBRES TO A HEAT TREATMENT AT 105 TO 175* C. UNTIL THERE IS AN INCREASE IN WEIGHT OF THE FIBRES OF ABOUT 6 TO ABOUT 10 PERCENT, WHEREBY THE RESULTANT FIBRES ARE RESERVED WITH RESPECT TO WOOL DYES OF THE ACID AND NEUTRAL DYEING TYPE.
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) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |