US2834760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Redox type polymerization
Assignee: Polysar Ltd
•
Filing: 1955-01-31
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Granted: 1958-05-13
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Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Robert J Orr
- 👤 Williams Harry Leverne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:58
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN THE PROCESS OF POLYMERIZING, IN AN AQUEOUS EMULSION, A CONJUGATED DIOLEFIN CONTAINING FROM 4 TO 12 CARBON ATOMS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF AN IRON SALT AND P-DIISOPROPYLBENZENE DIHYDROPEROXIDE, SAID DIHYDROPEROXIDE BEING PRESENT IN AN AMOUNT BETWEEN ABOUT 0.01 AND 0.4 PART BY WEIGHT BASED ON SAID DIOLEFIN.
Claim 2
Dependent Claim
56 words
IN THE PROCESS OF POLYMERIZING, IN AN AQUEOUS EMULSION, A CONJUGATED DIOLEFIN CONTAINING FROM 4 TO 12 CARBON ATOMS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF AN IRON SALT AND P-DIISOPROPYLBENZENE DIHYDROPEROXIDE, SAID DIHYDROPEROXIDE BEING PRESENT IN AN AMOUNT BETWEEN ABOUT 0.01 AND 0.4 PART BY WEIGHT BASED ON SAID DIOLEFIN.
References Cited (Backward Citations)
US2664447A
Cited
US2665269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |