US3632299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shrinkproofing of animal fibers by passing said through an electrical discharge zone containing ozone
Assignee: United States Department of Agriculture
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Filing: 1969-09-19
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Granted: 1972-01-04
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Expires: 1989-09-19
Abstract
Abstract Proteinous animal fibers are rendered shrinkproof by passing said directly through a high-voltage electrical discharge ozonegenerating zone which is at atmospheric pressure and open to the atmosphere. The dyeing properties of the fiber are unaffected by the treatment. Apparatus embodying both planar and curved discharge zones are described.
Inventors
- 👤 Walter J Thorsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/34; D06M10/00; D06M10/02; D06M10/025; H; H01; H01J; H01J37/00; H01J37/32; D06M2101/00; D06M2101/02; D06M2101/04; D06M2101/06; D06M2101/08; D06M2101/10; D06M2101/12; D06M2101/16; D06M2101/30; D06M2101/34; D06M2200/00; D06M2200/35; D06M2200/45; Y; Y10; Y10S; Y10S8/00; Y10S8/04; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
The method of claim 1 wherein the fibers are wool.
Claim 2
Dependent Claim
10 words
The method of claim 1 wherein the fibers are mohair.
References Cited (Backward Citations)
US3369981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |