US2422926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl-substituted aromatic sulfonates
Assignee: Wyandotte Chemicals Corp
•
Filing: 1944-04-01
•
Granted: 1947-06-24
•
Expires: 1964-04-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard F Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:20
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/30; C07C309/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2158680A
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US2247365A
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US1197019A
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US2049058A
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GB416379A
Cited
US2032097A
Cited
US2267725A
Cited
US2180314A
Cited
US2340838A
Cited
US2317987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-23 | 1950-12-23 | 1951-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-23 | 1954-12-23 | 1955-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-23 | 1958-12-23 | 1959-06-24 | $7700.00 | Window Closed / Lapsed |