Patent US2998402A successfully refreshed from Google Patents.
US2998402A
Expired / Lapsed
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Process for dyeing and coloring in the mass with perlyene derivatives
Assignee: Sandoz AG
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Filing: 1958-10-20
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Granted: 1961-08-29
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Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 Geiger Georg
- 👤 Steiner Karl Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:20
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
IN A PROCESS FOR THE DYEING OF FIBERS OF SYNTHETIC POLYAMIDES AND POLYESTERS IN THE MASS, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE DYEING IN THE MASS WITH A DYESTUFF OF THE FORMULA ULAE
Claim 2
Dependent Claim
35 words
IN A PROCESS FOR THE DYEING OF FIBERS OF SYNTHETIC POLYAMIDES AND POLYESTERS IN THE MASS, THE IMPROVEMENT WHICH CONSISTS IN CARRYING OUT THE DYEING IN THE MASS WITH A DYESTUFF OF THE FORMULA ULAE
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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |