Patent US2902476A successfully refreshed from Google Patents.
US2902476A
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Process for making diallylidene pentaerythritol copolymers
Assignee: Hercules Powder Co
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Filing: 1953-10-19
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Granted: 1959-09-01
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Expires: 1973-10-19
Abstract
No abstract record available.
Inventors
- 👤 Kern Werner
- 👤 Asta Gino Dall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:09
CPC Classifications
C; C08; C08F; C08F24/00; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
THE PROCESS FOR THE PREPARATION OF RESINOUS ADDITION COPOLYMERS WHICH COMPRISES HEATING DIALLYLIDENE PENTAERYTHRITOL AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, DIALLY PHTHALATE, STYRENE AND MALEIC ACID IN THE PRESENCE OF A FREE RADICAL-PRODUCING CATALYST TO FORM ADDITION POLYMER.
Claim 2
Dependent Claim
43 words
THE PROCESS FOR THE PREPARATION OF RESINOUS ADDITION COPOLYMERS WHICH COMPRISES HEATING DIALLYLIDENE PENTAERYTHRITOL AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, DIALLY PHTHALATE, STYRENE AND MALEIC ACID IN THE PRESENCE OF A FREE RADICAL-PRODUCING CATALYST TO FORM ADDITION POLYMER.
References Cited (Backward Citations)
DE707280C
Cited
US2401776A
Cited
DE868351C
Cited
DE858406C
Cited
US2478154A
Cited
US2471959A
Cited
DE838827C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |