US3522018A
Expired / Lapsed
US
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Apparatus for the continuous preparation of bis - 2 - hydroxyethyl phthalates
Assignee: Hoechst AG
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Filing: 1967-09-15
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Granted: 1970-07-28
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Expires: 1987-09-15
Abstract
No abstract record available.
Inventors
- 👤 Ditmar Bachmann
- 👤 Karl Heinz Grafen
- 👤 Wolfgang Fischer
- 👤 Armin Schubring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:00
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/785; B; B01; B01D; B01D3/00; B01D3/14; B01D3/32; B01J; B01J14/00; B01J19/00; B01J19/18; B01J19/1862; B01J19/24; B01J19/2415; B01J19/242; C07; C07C; C07C67/00; C07C67/03; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00101; B01J2219/00121; B01J2219/00128; B01J2219/00186; B01J2219/18; B01J2219/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2760850A
Cited
US3251657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |