Patent US2583150A successfully refreshed from Google Patents.
US2583150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styrene-polyester copolymer for photoelastic studies
Assignee: Westinghouse Electric Corp
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Filing: 1947-12-04
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Granted: 1952-01-22
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Expires: 1967-12-04
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Minter
- 👤 Newton C Foster
- 👤 Milton M Leven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:47
CPC Classifications
B; B29; B29C; B29C39/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN THE PROCESS OF POLYMERIZING A RELATIVELY LARGE BODY OF A COMPLETELY POLYMERIZABLE THERMOSETTING LIQUID COMPOSITION INTO A HOMOGENEOUS SOLID, THE LIQUID COMPOSITION COMPOSED OF AN ALKYD RESIN WHICH IS A POLYESTER OF A POLYHYDRIC ALCOHOL AND AN ALPHA, BETA-ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID AND A LIQUID POLYMERIZABLE MONOMER HAVING THE GROUP H2C=C<, THE STEPS COMPRISING DISSOLVING A POLYMERIZATION CATALYST COMPOSED OF AN ORGANIC PEROXIDE IN THE LIQUID COMPOSITION, PLACING THE CATALYZED LIQUID COMPOSITION IN A CONVEX CYLINDRICAL GLASS CONTAINER TO SUBSTANTIALLY FILL IT, SEALING THE CONTAINER AGAINST ENTRY OF ATMOSPHERIC GASES AND MOISTURE, MAINTAINING THE GLASS CONTAINER AND THE CATALYZED COMPOSITED THEREIN AT A TEMPERATURE OF BETWEEN 5* C. AND 18* C. IN THE SUBSTANTIAL ABSENCE OF PHOTO-CATALYTIC LIGHT, THE TEMPERATURE BEING RELATED TO THE INTERNAL DIMENSIONS OF THE GLASS CONTAINER BY THE EMPIRICAL EQUATION
Claim 2
Dependent Claim
135 words
IN THE PROCESS OF POLYMERIZING A RELATIVELY LARGE BODY OF A COMPLETELY POLYMERIZABLE THERMOSETTING LIQUID COMPOSITION INTO A HOMOGENEOUS SOLID, THE LIQUID COMPOSITION COMPOSED OF AN ALKYD RESIN WHICH IS A POLYESTER OF A POLYHYDRIC ALCOHOL AND AN ALPHA, BETA-ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID AND A LIQUID POLYMERIZABLE MONOMER HAVING THE GROUP H2C=C<, THE STEPS COMPRISING DISSOLVING A POLYMERIZATION CATALYST COMPOSED OF AN ORGANIC PEROXIDE IN THE LIQUID COMPOSITION, PLACING THE CATALYZED LIQUID COMPOSITION IN A CONVEX CYLINDRICAL GLASS CONTAINER TO SUBSTANTIALLY FILL IT, SEALING THE CONTAINER AGAINST ENTRY OF ATMOSPHERIC GASES AND MOISTURE, MAINTAINING THE GLASS CONTAINER AND THE CATALYZED COMPOSITED THEREIN AT A TEMPERATURE OF BETWEEN 5* C. AND 18* C. IN THE SUBSTANTIAL ABSENCE OF PHOTO-CATALYTIC LIGHT, THE TEMPERATURE BEING RELATED TO THE INTERNAL DIMENSIONS OF THE GLASS CONTAINER BY THE EMPIRICAL EQUATION
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) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |