Patent US3573244A successfully refreshed from Google Patents.
US3573244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for obtaining acid dye uniformity in polyamides
Assignee: Monsanto Co
•
Filing: 1968-10-16
•
Granted: 1971-03-30
•
Expires: 1988-10-16
Abstract
Abstract POLYAMIDES HAVING INCORPORATED THEREIN A SMALL AMOUNT OF A CERTAIN HINDERED PHENOL OR A CERTAIN QUINOLINE COMPOUND POSSESS EXCEPTIONAL ACID DYE UNIFORMLY.
Inventors
- 👤 Phil H Wilken
- 👤 Graham Leadbetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |