US3414579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing acid sulfuric acid esters from aromatic compounds containing beta-hydroxy-ethylsulfonyl groups
Assignee: Hoechst AG
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Filing: 1965-02-05
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Granted: 1968-12-03
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Expires: 1985-02-05
Abstract
No abstract record available.
Inventors
- 👤 Remy Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:25
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C07; C07C; C07C317/00; C07C317/26; C07C317/32; C07C317/34; C07C317/38; C07C317/40; C09B62/51
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |