US3616504A
Expired / Lapsed
US
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Linear polyester fiber shrinkage with hno3 or formic acid in a halogenated hydrocarbon and the products so shrunk
Assignee: Deering Milliken Research Corp
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Filing: 1968-10-23
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Granted: 1971-11-02
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Expires: 1988-10-23
Abstract
Abstract PROCESS, AND THE RESULTING PRODUCTS, FOR TREATING MATERIALS COMPOSED OF OR CONTAINING POLYESTER STRUCTURES TO ENHANCE THEIR PHYSICAL AND AESTHETIC PROPERTIES AND IMPROVE THE AFFINITY OF THE POLYESTER STRUCTURES TO DYESTUFFS AND OTHER CHEMICALS, COMPRISING THE STEP OF CONTEMPORANEOUSLY CONTACTING SOLID POLYESTER STRUCTURES WITH A HALOGENATED HYDROCARBON OF THE FORMULA CNHMXP, WHEREIN X=CHLORINE OR FLUORINE, N=1 OR 2, P=1 TO 2N+1, AND M=2N+2-P, AND AN ACID SELECTED FROM THE GROUP CONSISTING OF FORMIC AND NITRIC ACID.
Inventors
- 👤 Wolfgang K F Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:47
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/08; D06M11/00; D06M11/58; D06M11/64; D06M13/10; D06M13/184; D06M13/188; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |