US3222334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N,n-dialkylhydroxylamines as shortstopping agents for emulsion polymerizations
Assignee: Pennwalt Corp
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Filing: 1960-09-08
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Granted: 1965-12-07
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Expires: 1980-09-08
Abstract
No abstract record available.
Inventors
- 👤 Fred P Demme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:20
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
54 words
IN THE PROCESS OF PREPARING A SYNTHETIC RUBBER LATEX BY POLYMERIZING A CONJUGATED DIOLEFIN BY ADDITION THROUGH A FREE RADICAL MECHANISM AND TERMINATING THE POLYMERIZATION BY THE ADDITION OF A STOPPING AGENT, THE IMPROVEMENT WHICH COMPRISES USING AS SAID STOPPING AGENT AN N,NDIALKYLTHYDROXYLAMINE CONTAINING FROM ONE TO EIGHTEEN CARBON ATOMS IN EACH ALKYL GROUP.
Claim 2
Dependent Claim
54 words
IN THE PROCESS OF PREPARING A SYNTHETIC RUBBER LATEX BY POLYMERIZING A CONJUGATED DIOLEFIN BY ADDITION THROUGH A FREE RADICAL MECHANISM AND TERMINATING THE POLYMERIZATION BY THE ADDITION OF A STOPPING AGENT, THE IMPROVEMENT WHICH COMPRISES USING AS SAID STOPPING AGENT AN N,NDIALKYLTHYDROXYLAMINE CONTAINING FROM ONE TO EIGHTEEN CARBON ATOMS IN EACH ALKYL GROUP.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |