Patent US2983657A successfully refreshed from Google Patents.
US2983657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of grafted polymers
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1957-03-28
•
Granted: 1961-05-09
•
Expires: 1977-03-28
Abstract
No abstract record available.
Inventors
- 👤 Jeannine Gabilly
- 👤 Michel Jobard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:27
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; C08F; C08F259/00; C08F259/02; C08F259/04; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE METHOD OF MAKING GRAFTED POLYMERS THAT COMPRISES IMPREGNATING POLYVINYL CHLORIDE WITH A POLYMERIZABLE MONOMER CONTAINING ETHYLENIC UNSATURATED BONDS AND IRRADIATING THE IMPREGNATED MASS WITH IONIZING RADIATION UNTIL SUBSTANTIAL POLYMERIZATION IS COMPLETED, AND REPEATING THE IMPREGNATION AND RADIATION POLYMERIZATIONS UNTIL THE TOTAL GRAFT IS MORE THAN CAN BE INTRODUCED BY A SINGLE GRAFTING STEP.
Claim 2
Independent Claim
54 words
THE METHOD OF MAKING GRAFTED POLYMERS THAT COMPRISES IMPREGNATING POLYVINYL CHLORIDE WITH A POLYMERIZABLE MONOMER CONTAINING ETHYLENIC UNSATURATED BONDS AND IRRADIATING THE IMPREGNATED MASS WITH IONIZING RADIATION UNTIL SUBSTANTIAL POLYMERIZATION IS COMPLETED, AND REPEATING THE IMPREGNATION AND RADIATION POLYMERIZATIONS UNTIL THE TOTAL GRAFT IS MORE THAN CAN BE INTRODUCED BY A SINGLE GRAFTING STEP.
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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |