US2567803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulk polymerization of vinyl compounds using a sulfinic acid catalyst
Assignee: Gebr De Trey AG
•
Filing: 1948-02-04
•
Granted: 1951-09-11
•
Expires: 1968-02-04
Abstract
No abstract record available.
Inventors
- 👤 Castan Pierre
- 👤 Hagger Oskar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:42
CPC Classifications
C; C08; C08F; C08F4/00; C08F291/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN A PROCESS FOR THE CATALYTIC PREPARATION OF A BULK POLYMERIZED LIQUID MONOMER CONTAINING A TERMINAL CH2:C= GROUP, THE STEP O F PERFORMING THE POLYMERIZATION IN THE PRESENCE OF A SULFINIC ACID OF THE AROMATIC SERIES IN AN AMOUNT BETWEEN THE LIMITS OF ABOUT 0.1% AND ABOUT 5.0% TAKEN ON THE WEIGHT OF THE LIQUID MONOMER, SAID SULFINIC ACID BEING THE SOLE CATALYTIC AGENT.
Claim 2
Dependent Claim
64 words
IN A PROCESS FOR THE CATALYTIC PREPARATION OF A BULK POLYMERIZED LIQUID MONOMER CONTAINING A TERMINAL CH2:C= GROUP, THE STEP O F PERFORMING THE POLYMERIZATION IN THE PRESENCE OF A SULFINIC ACID OF THE AROMATIC SERIES IN AN AMOUNT BETWEEN THE LIMITS OF ABOUT 0.1% AND ABOUT 5.0% TAKEN ON THE WEIGHT OF THE LIQUID MONOMER, SAID SULFINIC ACID BEING THE SOLE CATALYTIC AGENT.
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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |