Patent US2661331A successfully refreshed from Google Patents.
US2661331A
Expired / Lapsed
US
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Photopolymerization process
Assignee: EIDP Inc
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Filing: 1950-02-01
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Granted: 1953-12-01
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Expires: 1970-02-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward G Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:21
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
PROCESS FOR POLYMERIZING AN ETHYLENICALLY UNSATURATED MONOMER SUBJECT TO ADDITION POLYMERIZATION WHICH COMPRISES IRRADIATING, WITH LIGHT IN THE RANGE 3200-7000 A., AN AQUEOUS DISPERSION CONTAINING SAID MONOMER, POLYVALENT ION OF THE CLASS CONSISTING OF CUPRIC, FERRIC, AND FERROUS IONS, AND A SOLUBLE SALT OF AN ARYL DIAZOSULFONIC ACID.
References Cited (Backward Citations)
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US2344785A
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US2375987A
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US2376014A
Cited
US2471959A
Cited
US2527393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |