US2643241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polysulfone resins with organic sulfides
Assignee: Phillips Petroleum Co
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Filing: 1951-01-02
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Granted: 1953-06-23
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Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
- 👤 John F Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD FOR THE PREPARATION OF ON OLEFINSULFUR DIOXIDE RESIN COMPOSITION, COMPRISING EMULSIFYING A MONO-OLEFINIC ORGANIC COMPOUND IN AN EMULSION OF THE OIL-WATER TYPE, AND IN THE PRESENCE OF SULFUR DIOXIDE IN A MOL RATIO TO SAID MONO-OLEFINIC COMPOUND GREATER THAN 1:1, EFFECTING INTERREACTION OF SAID SULFUR DIOXIDE WITH SAID MONO-OLEFINIC COMPOUND TO FORM A LATEX, INTRODUCING INTO INTIMATE ADMIXTURE WITH SAID LATEX AN ORGANIC SULFIDE CHARACTERIZED BY THE STRUCTURAL FORMULA
Claim 2
Independent Claim
71 words
A METHOD FOR THE PREPARATION OF ON OLEFINSULFUR DIOXIDE RESIN COMPOSITION, COMPRISING EMULSIFYING A MONO-OLEFINIC ORGANIC COMPOUND IN AN EMULSION OF THE OIL-WATER TYPE, AND IN THE PRESENCE OF SULFUR DIOXIDE IN A MOL RATIO TO SAID MONO-OLEFINIC COMPOUND GREATER THAN 1:1, EFFECTING INTERREACTION OF SAID SULFUR DIOXIDE WITH SAID MONO-OLEFINIC COMPOUND TO FORM A LATEX, INTRODUCING INTO INTIMATE ADMIXTURE WITH SAID LATEX AN ORGANIC SULFIDE CHARACTERIZED BY THE STRUCTURAL FORMULA
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |