US2556799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heteropolymerization of sulfur dioxide and an unsaturated organic compound in the presence of an iron polyphosphate
Assignee: Phillips Petroleum Co
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Filing: 1949-04-28
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Granted: 1951-06-12
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Expires: 1969-04-28
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
- 👤 John F Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:03
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR PRODUCING A HETEROPOLYMERIC RESIN FROM SULFUR DIOXIDE AND AN UNSATURATED ORGANIC MATERIAL WHICH REACTS THEREWITH TO FORM SUCH A RESIN, WHICH COMPRISES REACTING SAID MATERIALS WHILE SAID ORGANIC MATERIAL IS DISPERSED IN AN AQUEOUS EMULSION IN THE PRESENCE OF A CATALYST COMPOSITION COMPRISING A FERRIC ION AND A POLYPHOSPHATE ION SELECTED FROM THE GROUP CONSISTING OF PYROPHOSPHATE, TETRAPHOSPHATE, TRIPOLYPHOSPHATE, AND HEXAMETAPHOSPHATE IONS.
Claim 2
Dependent Claim
65 words
A PROCESS FOR PRODUCING A HETEROPOLYMERIC RESIN FROM SULFUR DIOXIDE AND AN UNSATURATED ORGANIC MATERIAL WHICH REACTS THEREWITH TO FORM SUCH A RESIN, WHICH COMPRISES REACTING SAID MATERIALS WHILE SAID ORGANIC MATERIAL IS DISPERSED IN AN AQUEOUS EMULSION IN THE PRESENCE OF A CATALYST COMPOSITION COMPRISING A FERRIC ION AND A POLYPHOSPHATE ION SELECTED FROM THE GROUP CONSISTING OF PYROPHOSPHATE, TETRAPHOSPHATE, TRIPOLYPHOSPHATE, AND HEXAMETAPHOSPHATE IONS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |