Patent US2689193A successfully refreshed from Google Patents.
US2689193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of textile materials to reduce their tendency to felt and to increase their abrasion resistance
Assignee: Commonwealth Scientific and Industrial Research Organisation
•
Filing: 1951-03-24
•
Granted: 1954-09-14
•
Expires: 1971-03-24
Abstract
No abstract record available.
Inventors
- 👤 Lipson Menzie
- 👤 Jackson David Leonard Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:37
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE METHOD OF REDUCING THE TENDENCY OF WOOL TO SHRINK WHICH COMPRISES TREATING TEXTILE MATERIAL CONTAINING WOOL WITH DILUTE SOLUTIONS IN ORGANIC SOLVENTS OF CAUSTIC ALKALI AND N-SUBSTITUTED POLYAMIDE TO LEAVE A DEPOSIT OF N-SUBSTITUTED POLYAMIDE ON THE FIBRE, AND SUBSEQUENTLY TREATING SAID DEPOSIT WITH AN ACID WHILE THE TREATED MATERIAL IS STILL MOIST FROM SAID SOLUTIONS TO NEUTRALIZE THE ALKALI AND CONVERT THE NSUBSTITUTED POLYAMIDE INTO UNSUBSTITUTED POLYAMIDE, SAID N-SUBSTITUTED POLYMIDE HAVING -CH2OX GROUPS ATTACHED TO AMIDO NITROGEN ATOMS, X BEING HYDROGEN OR A MONOVALENT HYDROCARBON RADICAL.
Claim 2
Independent Claim
88 words
THE METHOD OF REDUCING THE TENDENCY OF WOOL TO SHRINK WHICH COMPRISES TREATING TEXTILE MATERIAL CONTAINING WOOL WITH DILUTE SOLUTIONS IN ORGANIC SOLVENTS OF CAUSTIC ALKALI AND N-SUBSTITUTED POLYAMIDE TO LEAVE A DEPOSIT OF N-SUBSTITUTED POLYAMIDE ON THE FIBRE, AND SUBSEQUENTLY TREATING SAID DEPOSIT WITH AN ACID WHILE THE TREATED MATERIAL IS STILL MOIST FROM SAID SOLUTIONS TO NEUTRALIZE THE ALKALI AND CONVERT THE NSUBSTITUTED POLYAMIDE INTO UNSUBSTITUTED POLYAMIDE, SAID N-SUBSTITUTED POLYMIDE HAVING -CH2OX GROUPS ATTACHED TO AMIDO NITROGEN ATOMS, X BEING HYDROGEN OR A MONOVALENT HYDROCARBON RADICAL.
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) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |