US2837496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers and preparation thereof from polymer hydroperoxides
Assignee: Hercules Powder Co
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Filing: 1952-12-31
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Granted: 1958-06-03
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Expires: 1972-12-31
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/18; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/17; Y10S525/00; Y10S525/938; Y10S8/00; Y10S8/18; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE PROCESS OF PREPARING A GRAFT COPOLYMER WHICH COMPRISES POLYMERIZING A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER IN THE PRESENCE OD A POLYMER HYDROPEROXIDE, SAID POLYMER HYDROPEROXIDE BEING THE ONLY FREE RADICAL INITIATOR PRESENT IN THE POLYMERIZATION MIXTURE AND SAID POLYMER HYDROPEROXIDE BEING THE HYDROPEROXIDE OF A POLYMER OF A VINYLIDENE COMPOUND AND CONTAINING AT LEAST ABOUT 20 MONOMER UNITS.
Claim 2
Dependent Claim
58 words
THE PROCESS OF PREPARING A GRAFT COPOLYMER WHICH COMPRISES POLYMERIZING A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER IN THE PRESENCE OD A POLYMER HYDROPEROXIDE, SAID POLYMER HYDROPEROXIDE BEING THE ONLY FREE RADICAL INITIATOR PRESENT IN THE POLYMERIZATION MIXTURE AND SAID POLYMER HYDROPEROXIDE BEING THE HYDROPEROXIDE OF A POLYMER OF A VINYLIDENE COMPOUND AND CONTAINING AT LEAST ABOUT 20 MONOMER UNITS.
References Cited (Backward Citations)
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US2424851A
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US2525628A
Cited
FR999594A
Cited
GB679562A
Cited
DE818693C
Cited
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Cited
US2762790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |