Patent US2863714A successfully refreshed from Google Patents.
US2863714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrrocoline dyes for polyester materials
Assignee: Wyeth Holdings LLC
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Filing: 1956-08-22
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Granted: 1958-12-09
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Expires: 1976-08-22
Abstract
No abstract record available.
Inventors
- 👤 Robert S Long
- 👤 Richard J Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:08
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
THE PROCESS OF DYEING SYNTHETIC ORGANIC FIBERS SELECTED FROM SUPERPOLYESTERS AND CELLULOSE ESTERS WITH AMIDES DERIVED FROM ACIDS OF THE STRUCTURE:
Claim 2
Dependent Claim
21 words
THE PROCESS OF DYEING SYNTHETIC ORGANIC FIBERS SELECTED FROM SUPERPOLYESTERS AND CELLULOSE ESTERS WITH AMIDES DERIVED FROM ACIDS OF THE STRUCTURE:
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |