US2578259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization process and product
Assignee: Individual
•
Filing: 1946-03-05
•
Granted: 1951-12-11
•
Expires: 1966-03-05
Abstract
No abstract record available.
Inventors
- 👤 Edward B Mcmillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/04; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/16; C08F212/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
AS A NEW COMPOSITION OF MATTER, A PLASTIC RESIN FORMED BY THE COPOLYMERIZATION OF SUBSTANTIALLY EQUAL AMOUNTS BY WEIGHT OF MALEIC ANHYDRIDE AND 2,5-DICHLOROSTYRENE IN THE PRESENCE OF A PEROXIDE CATALYST AT AN INITIAL TEMPERATURE 80-90* C. FOR 15 MINUTES FOLLOWED BY HOLDING AT A TEMPERATURE OF 105-120* C. FROM 30 TO 40 MINUTES.
Claim 2
Dependent Claim
54 words
AS A NEW COMPOSITION OF MATTER, A PLASTIC RESIN FORMED BY THE COPOLYMERIZATION OF SUBSTANTIALLY EQUAL AMOUNTS BY WEIGHT OF MALEIC ANHYDRIDE AND 2,5-DICHLOROSTYRENE IN THE PRESENCE OF A PEROXIDE CATALYST AT AN INITIAL TEMPERATURE 80-90* C. FOR 15 MINUTES FOLLOWED BY HOLDING AT A TEMPERATURE OF 105-120* C. FROM 30 TO 40 MINUTES.
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) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |