Patent US3620666A successfully refreshed from Google Patents.
US3620666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for chemically texturing polyester fibers
Assignee: Honeywell International Inc
•
Filing: 1968-04-01
•
Granted: 1971-11-16
•
Expires: 1988-04-01
Abstract
Abstract Process for chemically texturing fibers, particularly polyester fibers, by treatment of the fibers with treating agents in aqueous solution of perfluorinated or perfluorochlorinated ketone hydrates which cause differential swelling to occur between the skin and core of the fibers.
Inventors
- 👤 Robert W Lenz
- 👤 Leo Barish
- 👤 Virginia L Lyons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:28
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/133
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
35 words
The process of claim 1 wherein the aqueous solution consists essentially of hexafluoroacetone trihydrate diluted with water in the range of from about 8:1 to about 2.:1 parts of hexafluoroacetone trihydrate per part of water.
Claim 2
Dependent Claim
58 words
The process of claim 2 wherein the aqueous solution contains from about 8:1 to about 12:1 parts of hexafluoroacetone trihydrate per part of water. 4. The process of claim 2 wherein the fibers are maintained in a sufficiently slack condition to permit a stress-free contraction of from about 15 to about 25 percent of the original fiber length.
Claim 3
Dependent Claim
20 words
The process of claim 2 wherein the curled fibers are subsequently treated by exposure to steam to effect further curling.
Claim 4
Dependent Claim
15 words
The process of claim 2 wherein the contact time is less than about 30 minutes.
Claim 5
Dependent Claim
35 words
The process of claim 1 wherein the aqueous solution consists essentially of pentafluoromonochloroacetone trihydrate diluted with water in the range of from about 5:1 to about 20:1 parts of pentafluoromonochloroacetone trihydrate per part of water.
Claim 6
Dependent Claim
24 words
The process of claim 7 wherein the aqueous solution contains from about 7:1 to about 20:1 parts of pentafluoromonochloroacetone trihydrate per part of water.
Claim 7
Dependent Claim
33 words
The process of claim 7 wherein the fibers are maintained in a sufficiently slack condition to permit a stress-free contraction of from about 15 to about 25 percent of the original fiber length.
Claim 8
Dependent Claim
20 words
The process of claim 7 wherein the curled fibers are subsequently treated by exposure to steam to effect further curling.
Claim 9
Dependent Claim
15 words
The process of claim 7 wherein the contact time is less than about 30 minutes.
Claim 10
Dependent Claim
35 words
The process of claim 1 wherein the aqueous solution consists essentially of tetrafluorodichloroacetone dihydrate diluted with water in the range of from about 3:1 to about 10:1 parts of tetrafluorodichloroacetone dihydrate per part of water.
Claim 11
Dependent Claim
35 words
The process of claim 12 wherein the aqueous solution consists essentially of tetrafluorodichloroacetone dihydrate diluted with water in the range of from about 3:1 to about 5:1 parts of tetrafluorodichloroacetone dihydrate per part of water.
Claim 12
Dependent Claim
33 words
The process of claim 12 wherein the fibers are maintained in a sufficiently slack condition to permit a stress-free contraction of from about 15 to about 25 percent of the original fiber length.
Claim 13
Dependent Claim
20 words
The process of claim 12 wherein the curled fibers are subsequently treated by exposure to steam to effect further curling.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |