Patent US4745277A successfully refreshed from Google Patents.
Patent US3433788A successfully refreshed from Google Patents.
US3433788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of amines from aqueous solutions by solvent treatment and distillation
Assignee: Union Carbide Corp
•
Filing: 1966-04-27
•
Granted: 1969-03-18
•
Expires: 1986-04-27
Abstract
No abstract record available.
Inventors
- 👤 George S Somekh
- 👤 Edward N Hawkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:14
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D265/00; C07D265/28; C07D265/34; C07D265/36; C07D295/04; C07D401/00; C07D401/02; C07D401/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2969375A
Cited
US2698286A
Cited
US2695867A
Cited
US2776972A
Cited
US2900310A
Cited
US3055809A
Cited
US3087928A
Cited
US3321284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |