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US2419082A
Expired / Lapsed
US
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Unsaturated ethers of cyclic sulfones
Assignee: Shell Development Co
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Filing: 1942-06-06
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Granted: 1947-04-15
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Expires: 1962-06-06
Abstract
No abstract record available.
Inventors
- 👤 Rupert C Morris
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:38
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/46; C07D333/48; C08; C08K; C08K5/00; C08K5/36; C08K5/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-14 | 1950-10-14 | 1951-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-14 | 1954-10-14 | 1955-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-14 | 1958-10-14 | 1959-04-15 | $7700.00 | Window Closed / Lapsed |