US2299223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the catalytic production of olefin-sulphur dioxide compounds of high molecular weight
Assignee: Phillips Petroleum Co
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Filing: 1941-07-28
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Granted: 1942-10-20
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Expires: 1961-07-28
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Frey
- 👤 Snow Robert Dewey
- 👤 Walter A Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:39
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22
Claims Analysis
Total Claims: 0
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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) | 1945-10-19 | 1946-04-20 | 1946-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-10-19 | 1950-04-20 | 1950-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-10-19 | 1954-04-20 | 1954-10-20 | $7700.00 | Window Closed / Lapsed |