Patent US3822996A successfully refreshed from Google Patents.
US3822996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble thioureas to inhibit ozone fading of dyed polyamides
Assignee: Honeywell International Inc
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Filing: 1972-05-22
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Granted: 1974-07-09
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Expires: 1992-05-22
Abstract
Abstract WHEN FROM ABOUT 0.2 PERCENT TO ABOUT 5 PERCENT OF WATER-SOLUBLE THIOUREAS ARE COATED ON NYLON FIBER, IMPROVED DYEFASTNESS IS ACHIEVED COMPARED TO AN UNTREATED DYED NYLON FIBER WHEN THIS FIBER IS EXPOSED TO OZONE.
Inventors
- 👤 R Lofquist
- 👤 P Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:10
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/242; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/649; D06P1/6491; D06P3/26; Y; Y10; Y10S; Y10S8/00; Y10S8/929
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |