US2950503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanization of nuclear alkyl substituted styrenes with organic peroxides
Assignee: Veolia WTS Systems USA Inc
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Filing: 1956-12-05
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Granted: 1960-08-30
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Expires: 1976-12-05
Abstract
No abstract record available.
Inventors
- 👤 Wayne A Mcrae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:21
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
IN THE METHOD OF FORMING A SOLID MEMBRANE COMPRISING AN INSOLUBLE INFUSIBLE SYNTHETIC ORGANIC POLYMERIC STRUCTURE, THE STEPS OF FORMING A DISPERSION IN AN ORGANIC SOLVENT OF A POLYMER OF VINYL TOLUENE, INTIMATELY MIXING THEREWITH FROM 0.1 TO 10% BY WEIGHT OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF DICUMYL PEROXIDE, DITERTIARY BUTYL PEROXIDE, TERTIARY BUTYL PERBENZOATE, DITERTIARY BUTYL DIPERPHTHALATE, 2,2-BIS-TERTIARY BUTYL PEROXYBUTANE AND TERTIARY BUTYL HYDROPEROXIDE, SHAPING SAID DISPERSION INTO FILM FORM AND CURING SAID FILM TO THE INSOLUBLE INFUSIBLE STATE AT A TEMPERATURE BETWEEN 130* TO 180* C. IN THE PRESENCE OF SAID ORGANIC SOLVENT UNDER CONDITIONS SUBSTANTIALLY PREVENTIVE OF THE ESCAPE OF SAID SOLVENT THEREBY FORMING SAID POLYMERIC STRUCTURE, THEREAFTER SUBSTANTIALLY MAINTAINING THE SOLVENT CONTENT OF
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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) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |