Patent US2945003A successfully refreshed from Google Patents.
US2945003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel copolymers
Assignee: PPG Industries Inc
•
Filing: 1953-12-14
•
Granted: 1960-07-12
•
Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Olson
- 👤 Roger M Christenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:16
CPC Classifications
C; C08; C08F; C08F230/00; C08F230/04; C08F230/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOD OF FORMING A COPOLYMER RESIN WHICH IS SOLUBLE IN TOLUENE, SAID METHOD COMPRISING HEATING TO A TEMPERATURE OF ABOUT 50*C. TO ABOUT 200*C., A MIXTURE OF (A) ABOUT 0.2 TO ABOUT 5 PERCENT BY WEIGHT BASED UPON THE MIXTURE OF AN ORGANIC PEROXIDE CATALYST OF INTERPOLYMERIZATION OF THE MIXTURE, (B) ABOUT 50 TO ABOUT 90 PERCENT BY WEIGHT BASED UPON THE MIXTURE OF A POLYMERIZABLE MONOMERIC COMPOUND CONTAINING A >C=CH2 GROUP, THE REST OF THE MIXTURE BEING A POLYSILOXANE WHICH IS SOLUBLE IN AROMATIC HYDROCARBON SOLVENTS AND WHICH CONSISTS OF UNITS WHICH ARE OF THE AVERAGE EMPIRICAL FORMULA:
Claim 2
Independent Claim
100 words
A METHOD OF FORMING A COPOLYMER RESIN WHICH IS SOLUBLE IN TOLUENE, SAID METHOD COMPRISING HEATING TO A TEMPERATURE OF ABOUT 50*C. TO ABOUT 200*C., A MIXTURE OF (A) ABOUT 0.2 TO ABOUT 5 PERCENT BY WEIGHT BASED UPON THE MIXTURE OF AN ORGANIC PEROXIDE CATALYST OF INTERPOLYMERIZATION OF THE MIXTURE, (B) ABOUT 50 TO ABOUT 90 PERCENT BY WEIGHT BASED UPON THE MIXTURE OF A POLYMERIZABLE MONOMERIC COMPOUND CONTAINING A >C=CH2 GROUP, THE REST OF THE MIXTURE BEING A POLYSILOXANE WHICH IS SOLUBLE IN AROMATIC HYDROCARBON SOLVENTS AND WHICH CONSISTS OF UNITS WHICH ARE OF THE AVERAGE EMPIRICAL FORMULA:
References Cited (Backward Citations)
US2438520A
Cited
US2443740A
Cited
US2438612A
Cited
US2728740A
Cited
US2716638A
Cited
US2777829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |