Patent US2507526A successfully refreshed from Google Patents.
US2507526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo catalysts in the preparation of olefin-sulfur dioxide resins
Assignee: EIDP Inc
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Filing: 1946-05-21
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Granted: 1950-05-16
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Expires: 1966-05-21
Abstract
No abstract record available.
Inventors
- 👤 Jacobson Ralph Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:07
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN THE PROCESS OF MAKING SOLID POLYMERS FROM SULFUR DIOXIDE AND OLEFINS HAVING HYDROGEN ON DOUBLY BONDED CARBON, THE IMPROVEMENT WHEREIN THE SULFUR DIOXIDE IS REACTED WITH THE OLEFIN COMPONENT IN THE PRESENCE OF, AS A CATALYST, AN ALIPHATIC AZO COMPOUND HAVING BOTH VALANCES OF THE AZO, -N=N-, GROUP JOINED TO DIFFERENT TERTIARY CARBON ATOMS EACH FURTHER BONDED TO A GROUP OF THE CLASS CONSISTING OF THE NITRILE, CARBOALKOXY, AND CARBONAMIDO GROUPS.
Claim 2
Dependent Claim
72 words
IN THE PROCESS OF MAKING SOLID POLYMERS FROM SULFUR DIOXIDE AND OLEFINS HAVING HYDROGEN ON DOUBLY BONDED CARBON, THE IMPROVEMENT WHEREIN THE SULFUR DIOXIDE IS REACTED WITH THE OLEFIN COMPONENT IN THE PRESENCE OF, AS A CATALYST, AN ALIPHATIC AZO COMPOUND HAVING BOTH VALANCES OF THE AZO, -N=N-, GROUP JOINED TO DIFFERENT TERTIARY CARBON ATOMS EACH FURTHER BONDED TO A GROUP OF THE CLASS CONSISTING OF THE NITRILE, CARBOALKOXY, AND CARBONAMIDO GROUPS.
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) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |