US2831843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of vinyl chloride
Assignee: Uniroyal Inc
•
Filing: 1955-08-01
•
Granted: 1958-04-22
•
Expires: 1975-08-01
Abstract
No abstract record available.
Inventors
- 👤 Dexter C Seymour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:32
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08F2438/00; C08F2438/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE METHOD WHICH COMPRISES POLYMERIZING VINYL CHLORIDE AT 25*C. TO 60*C. IN THE PRESENCE OF A FREE RADICAL PRODUCING POLYMERIZATION INITIATOR AND 0.1 TO 8%, BASED ON THE WEIGHT OF THE VINYL CHLORIDE, OF A TRIHALOMETHANE SELECTED FROM THE GROUP CONSISTING OF DIBROMOCHLOROMETHANE AND BROMODICHLOROMETHANE.
Claim 2
Independent Claim
45 words
THE METHOD WHICH COMPRISES POLYMERIZING VINYL CHLORIDE AT 25*C. TO 60*C. IN THE PRESENCE OF A FREE RADICAL PRODUCING POLYMERIZATION INITIATOR AND 0.1 TO 8%, BASED ON THE WEIGHT OF THE VINYL CHLORIDE, OF A TRIHALOMETHANE SELECTED FROM THE GROUP CONSISTING OF DIBROMOCHLOROMETHANE AND BROMODICHLOROMETHANE.
References Cited (Backward Citations)
FR923547A
Cited
US2729627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |