US3456428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of bubbles from adipic acid-nitrogen vapor
Assignee: Rhone Poulenc SA
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Filing: 1967-03-06
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Granted: 1969-07-22
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Expires: 1987-03-06
Abstract
Abstract 1,128,747. Liquid/gas separator. RHONEPOULENC S.A. 7 March, 1967 [7 March, 1966], No. 10730/67. Heading BIT. A process for removing bubbles from a saturated vapour of adipic acid containing a suspension of adipic acid bubbles and an inert gas and/or solid particles comprises the steps of condensing by cooling to below its dew point a very small quantity of the vapour and thereafter passing the vapour and condensed vapour through a bubble arresting device, the quantity of condensed vapour being sufficient to form a film of very pure liquid on the arresting device for washing the latter.
Inventors
- 👤 Georges Bichet
- 👤 Paul Cruiziat
- 👤 Jean Damay
- 👤 Pierre Joseph Frechet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:37
CPC Classifications
C; C07; C07C; C07C255/00; B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D45/10; B01D47/00; B01D47/02; B01D47/021; B01D47/05; B01D51/00; B01D51/02; C07C51/00; C07C51/42; C22; C22B; C22B5/00; C22B5/02; C22B5/16
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |