US2993748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of wool with acid chlorides in the presence of dimethylformamide
Assignee: Individual
•
Filing: 1959-12-10
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Granted: 1961-07-25
•
Expires: 1979-12-10
Abstract
No abstract record available.
Inventors
- 👤 Nathan H Koenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:28
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR CHEMICALLY MODIFYING WOOL WHICH COMPRISES REACTING WOOL UNDER ESSENTIALLY ANHYDROUS CONDITIONS, IN THE PRESENCE OF DIMETHYLFORMAMIDE, WITH AN ACID CHLORIDE OF THE CLASS CONSISTING OF ALIPHATIC, AROMATIC, AND AROMATIC-ALIPHATIC ACID CHLORIDES, AT A TEMPERATURE ABOUT FROM 25 TO 135*C. UNTIL THE WOOL COMBINES WITH ABOUT FROM 1 TO 40% OF ITS WEIGHT OF THE ACID CHLORIDE.
Claim 2
Dependent Claim
59 words
A PROCESS FOR CHEMICALLY MODIFYING WOOL WHICH COMPRISES REACTING WOOL UNDER ESSENTIALLY ANHYDROUS CONDITIONS, IN THE PRESENCE OF DIMETHYLFORMAMIDE, WITH AN ACID CHLORIDE OF THE CLASS CONSISTING OF ALIPHATIC, AROMATIC, AND AROMATIC-ALIPHATIC ACID CHLORIDES, AT A TEMPERATURE ABOUT FROM 25 TO 135*C. UNTIL THE WOOL COMBINES WITH ABOUT FROM 1 TO 40% OF ITS WEIGHT OF THE ACID CHLORIDE.
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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |