US2876133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing organophilic particulate solids by polymerizing ethylenically unsaturated monomers upon the surface of organophobic particulate solids
Assignee: EIDP Inc
•
Filing: 1954-11-15
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Granted: 1959-03-03
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Expires: 1974-11-15
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Iler
- 👤 Robert D Lipscomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/34; C08F292/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
PROCESS FOR PREPARING ORGANOPHILIC PARTICULATE SOLIDS WHICH COMPRISES PASSING VAPORS OF AT LEAST MONOMER INTO POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER INTO CONTACT WITH DEGASSED ORGANOPHOBIC PARTICULATE SOLIDS COATED WITH A FREE RADICAL GENERATING, ADDITION-POLYMERIZATION INITIATOR AND POLYMERIZING THE VAPORIZED ETHYLENICALLY UNSATURATED MONOMER ON THE SURFACES OF SAID DEGASSED INITIATOR-COATED PARTICULATE SOLIDS, AND OBTAINING AS THE RESULTING PRODUCT ORGANOPHILIC PARTICULATE SOLIDS COATED WITH THE POLYMERIZED ETHYLENICALLY UNSATURATED MONOMER.
Claim 2
Dependent Claim
66 words
PROCESS FOR PREPARING ORGANOPHILIC PARTICULATE SOLIDS WHICH COMPRISES PASSING VAPORS OF AT LEAST MONOMER INTO POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER INTO CONTACT WITH DEGASSED ORGANOPHOBIC PARTICULATE SOLIDS COATED WITH A FREE RADICAL GENERATING, ADDITION-POLYMERIZATION INITIATOR AND POLYMERIZING THE VAPORIZED ETHYLENICALLY UNSATURATED MONOMER ON THE SURFACES OF SAID DEGASSED INITIATOR-COATED PARTICULATE SOLIDS, AND OBTAINING AS THE RESULTING PRODUCT ORGANOPHILIC PARTICULATE SOLIDS COATED WITH THE POLYMERIZED ETHYLENICALLY UNSATURATED MONOMER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |