US3473896A
Expired / Lapsed
US
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Apparatus for preparing alkali metal salts of aromatic hydroxy compounds
Assignee: Hoechst AG
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Filing: 1966-08-11
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Granted: 1969-10-21
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Expires: 1986-08-11
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Halder
- 👤 Hansjurgen Ullrich
- 👤 Horst Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:10
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/64; B; B01; B01F; B01F25/00; B01F25/70; B01F25/74; B01F35/00; B01F35/90; B01F35/91; B01J; B01J14/00; B01J19/00; B01J19/18; B01J19/1806; B01J19/20; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00121; B01J2219/19; B01J2219/194; B01J2219/1941; B01J2219/1946
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) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |