Patent US2171805A successfully refreshed from Google Patents.
US2559345A
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Casting method and compositions
Assignee: Individual
•
Filing: 1950-02-01
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Granted: 1951-07-03
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Expires: 1970-02-01
Abstract
No abstract record available.
Inventors
- 👤 James S Church
- 👤 Herman R Tyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:01
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
THE METHOD OF CASTING METHYL METHACRYLATE WHICH COMPRISES DISSOLVING POLYMERIC METHYL METHACRYLATE IN MONOMERIC METHYL METHACRYLATE WITH THE AID OF A SOLVENT FROM THE CLASS CONSISTING OF METHYLENE DICHLORIDE, METHYL FORMATE, ACETONE AND CHLOROFORM, REMOVING THE SOLVENT BY VACUUM DISTILLATION ESSENTIALLY WITHOUT INITIATVACUUM DISTILLATION OF THE MONOMER AND CASTING THE RESULTING POLYMER-MONOMER SOLUTION AT A TEMPERATURE NOT IN EXCESS OF 50* C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |