US3296177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopping agents for synthetic rubber polymerization
Assignee: Pennwalt Corp
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Filing: 1964-11-13
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Granted: 1967-01-03
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Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 Haines Paul Gordon
- 👤 Whiton Alfred Case
- 👤 Albert Harry Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:39
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F2/00; C08F2/38; C08F2/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
IN THE PROCESS OF POLYMERIZING AN ETHYLENICALLY UNSATURATED MONOMER AND TERMINATING THE POLYMERIZATION BY THE ADDITION OF A STOPPING AGENT, THE IMPROVEMENT WHICH COMPRISES USING AS SAID STOPPING AGENT A BISOXALATE SALT OF AN ALKYL HYDROXYLAMINE HAVING THE STRUCTURE
Claim 2
Dependent Claim
39 words
IN THE PROCESS OF POLYMERIZING AN ETHYLENICALLY UNSATURATED MONOMER AND TERMINATING THE POLYMERIZATION BY THE ADDITION OF A STOPPING AGENT, THE IMPROVEMENT WHICH COMPRISES USING AS SAID STOPPING AGENT A BISOXALATE SALT OF AN ALKYL HYDROXYLAMINE HAVING THE STRUCTURE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |