Patent US2728751A successfully refreshed from Google Patents.
US2728751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long chain acrylic type ester/aminostyrene copolymers
Assignee: EIDP Inc
•
Filing: 1953-02-25
•
Granted: 1955-12-27
•
Expires: 1973-02-25
Abstract
No abstract record available.
Inventors
- 👤 Willard E Catlin
- 👤 Benjamin W Howk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:58
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1812; C08F220/1808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A COPOLYMER OF LAURYL METHACRYLATE WITH A P-AMINOSTYRENE, SAID COPOLYMER CONTAINING 0.1 TO 4.5%, BY WEIGHT, OF PRIMARY AMINO NITROGEN AND HAVING AT LEAST 85%, BY WEIGHT, OF SAID COPOLYMER, OF THE RECITED COMPONENTS AND NOT MORE THAN 15%, BY WEIGHT OF SAID COPOLYMER, OF ANOTHER ADDITION COPOLYMERIZABLE ETHYLENIC MONOMER COMPONENT.
Claim 2
Dependent Claim
51 words
A COPOLYMER OF LAURYL METHACRYLATE WITH A P-AMINOSTYRENE, SAID COPOLYMER CONTAINING 0.1 TO 4.5%, BY WEIGHT, OF PRIMARY AMINO NITROGEN AND HAVING AT LEAST 85%, BY WEIGHT, OF SAID COPOLYMER, OF THE RECITED COMPONENTS AND NOT MORE THAN 15%, BY WEIGHT OF SAID COPOLYMER, OF ANOTHER ADDITION COPOLYMERIZABLE ETHYLENIC MONOMER COMPONENT.
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |