US2850445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymerization
Assignee: Individual
•
Filing: 1955-01-19
•
Granted: 1958-09-02
•
Expires: 1975-01-19
Abstract
No abstract record available.
Inventors
- 👤 Oster Gerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:49
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
PROCESS FOR THE CONTINUOUS PRODUCTION OF VINYL POLYMERS WHICH COMPRISES SUBSTANTIALLY CONTINUOUSLY DISSOLVING A QUANTITY OF A POLYMERIZABLE VINYL COMPOUND IN A LIQUID BODY OF A SOLVENT FOR SAID POLYMERIZABLE VINYL COMPOUND AND A SUBSTANTIALLY NON-SOLVENT FOR THE POLYMER THEREOF CONTAINING AN ORGANIC PHOTO-REDUCIBLE DYE AND A REDUCING AGENT HAVING A REDUCTION POTENTIAL INCAPABLE OF REDUCING SAID DYE IN THE ABSENCE OF LIGHT, BUT OF SUFFICIENT STRENGTH TO REDUCE THE PHOTO-EXCITED DYE AND OXYGEN, SUBSTANTIALLY CONTINUOUSLY IRRADIATING SAID LIQUID BODY WITH VISIBLE LIGHT TO SUBSTANTIALLY CONTINUOUSLY POLYMERIZE THE DISSOLVED POLYMERIZABLE VINYL COMPOUND AND TO SUBSTANTIALLY CONTINUOUSLY PRECIPITATE OUT THE POLYMER OF SAID POLYMERIZABLE VINYL COMPOUND FORMED, SAID DYE AND REDUCING AGENT BEING INITIALLY PRESENT IN SUFFICIENT AMOUNT TO PRODUCE FREE RADICALS FOR THE POLYMERIZATION OF SAID POLYMERIZABLE VINYL COMPOUND WHEN IRRADIATED WITH VISIBLE LIGHT.
Claim 2
Dependent Claim
134 words
PROCESS FOR THE CONTINUOUS PRODUCTION OF VINYL POLYMERS WHICH COMPRISES SUBSTANTIALLY CONTINUOUSLY DISSOLVING A QUANTITY OF A POLYMERIZABLE VINYL COMPOUND IN A LIQUID BODY OF A SOLVENT FOR SAID POLYMERIZABLE VINYL COMPOUND AND A SUBSTANTIALLY NON-SOLVENT FOR THE POLYMER THEREOF CONTAINING AN ORGANIC PHOTO-REDUCIBLE DYE AND A REDUCING AGENT HAVING A REDUCTION POTENTIAL INCAPABLE OF REDUCING SAID DYE IN THE ABSENCE OF LIGHT, BUT OF SUFFICIENT STRENGTH TO REDUCE THE PHOTO-EXCITED DYE AND OXYGEN, SUBSTANTIALLY CONTINUOUSLY IRRADIATING SAID LIQUID BODY WITH VISIBLE LIGHT TO SUBSTANTIALLY CONTINUOUSLY POLYMERIZE THE DISSOLVED POLYMERIZABLE VINYL COMPOUND AND TO SUBSTANTIALLY CONTINUOUSLY PRECIPITATE OUT THE POLYMER OF SAID POLYMERIZABLE VINYL COMPOUND FORMED, SAID DYE AND REDUCING AGENT BEING INITIALLY PRESENT IN SUFFICIENT AMOUNT TO PRODUCE FREE RADICALS FOR THE POLYMERIZATION OF SAID POLYMERIZABLE VINYL COMPOUND WHEN IRRADIATED WITH VISIBLE LIGHT.
References Cited (Backward Citations)
US2543817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |