Patent US2426648A successfully refreshed from Google Patents.
US2426648A
Expired / Lapsed
US
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Manufacture of sulfur compounds
Assignee: Phillips Petroleum Co
•
Filing: 1943-10-19
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Granted: 1947-09-02
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Expires: 1963-10-19
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 Willie W Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:18
CPC Classifications
C; C07; C07B; C07B45/00; C07C; C07C319/00; C07C319/02; C07C319/04; C07C319/14; C07C319/16; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1836170A
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US1836183A
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US1836171A
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US2052268A
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US2051807A
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US2352435A
Cited
GB532676A
Cited
US2296399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |