US2826601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for producing cyanohydrins
Assignee: Carbogen Corp
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Filing: 1957-02-05
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Granted: 1958-03-11
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Expires: 1977-02-05
Abstract
No abstract record available.
Inventors
- 👤 Barsky George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:27
CPC Classifications
C; C07; C07C; C07C255/00; B; B01; B01D; B01D3/00; B01D3/14; B01J; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00083; B01J2219/00087; B01J2219/00101; B01J2219/00105; B01J2219/0011; B01J2219/00159; Y; Y10; Y10S; Y10S203/00; Y10S203/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A CONTINUOUS METHOD OF MAKING CYANOHYDRINS COMPRISING CAUSING A SUBSTANCE TAKEN FROM THE CLASS CONSISTING OF LIQUID ALDEHYDES AND KETONES TO PASS DOWNWARDLY THROUGH A REACTION ZONE, PASSING A GAS CONTAINING HCN UPWARDLY THROUGH SAID REACTION ZONE IN CONTACT WITH SAID SUBSTANCE, INTRODUCING AN ALKALI INTO THE REACTION ZONE, THEN ADDING AN ACID TO NEUTRALIZE SAID ALKALI AND PASSING THE REACTION PRODUCT INTO A STRIPPING ZONE, HEATING SAID PRODUCT TO VAPORIZE UNREACTED HCN AND SUBSTANCE, AND INTRODUCING THE VAPORS SO FORMED INTO THE REACTION ZONE, THE IMPROVEMENT WHICH COMPRISES FEEDING A PART OF SAID PRODUCT INTO THE UPPER PART OF A SCRUBBER ZONE AND INTRODUCING GASES FROM SAID REACTION ZONE INTO THE LOWER PART OF SAID SCRUBBER ZONE.
Claim 2
Dependent Claim
119 words
IN A CONTINUOUS METHOD OF MAKING CYANOHYDRINS COMPRISING CAUSING A SUBSTANCE TAKEN FROM THE CLASS CONSISTING OF LIQUID ALDEHYDES AND KETONES TO PASS DOWNWARDLY THROUGH A REACTION ZONE, PASSING A GAS CONTAINING HCN UPWARDLY THROUGH SAID REACTION ZONE IN CONTACT WITH SAID SUBSTANCE, INTRODUCING AN ALKALI INTO THE REACTION ZONE, THEN ADDING AN ACID TO NEUTRALIZE SAID ALKALI AND PASSING THE REACTION PRODUCT INTO A STRIPPING ZONE, HEATING SAID PRODUCT TO VAPORIZE UNREACTED HCN AND SUBSTANCE, AND INTRODUCING THE VAPORS SO FORMED INTO THE REACTION ZONE, THE IMPROVEMENT WHICH COMPRISES FEEDING A PART OF SAID PRODUCT INTO THE UPPER PART OF A SCRUBBER ZONE AND INTRODUCING GASES FROM SAID REACTION ZONE INTO THE LOWER PART OF SAID SCRUBBER ZONE.
References Cited (Backward Citations)
US2731490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |