US2663725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the pyrolysis of diacyl cyanides
Assignee: Goodrich Corp
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Filing: 1952-05-07
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Granted: 1953-12-22
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Expires: 1972-05-07
Abstract
No abstract record available.
Inventors
- 👤 Louis F Reuter
- 👤 Richard D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:03
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE METHOD FOR THE PREPARATION OF MONOMERIC 1,1-DICYANO ETHYLENE AND ITS LOWER ALKYL 2SUBSTITUTED HOMOLOGS BY THE VAPOR PHASE PYROLYTIC DEACYLOXYATION OF A DIACYL CYANIDE AT A TEMPERATURE OF 300 TO 800* C., THE STEP OF RAPIDLY CONDENSING THE HOT PYROLYSIS VAPORS BY BRINGING A STREAM OF HOT PYROLYSIS VAPORS INTO CONCURRENT FLOW WITH A MOVING STREAM OF A COLD INERT QUENCH LIQUID, THE WEIGHT RATIO OF QUENCH LIQUID TO PYROLYSIS PRODUCT BEING AT LEAST 50 TO 1 AND THE SAID QUENCH LIQUID CONTAINING AN INERT LIQUID AROMATIC COMPOUND AND BEING AT A TEMPERATURE NOT HIGHER THAN ROOM TEMPERATURE.
Claim 2
Dependent Claim
100 words
IN THE METHOD FOR THE PREPARATION OF MONOMERIC 1,1-DICYANO ETHYLENE AND ITS LOWER ALKYL 2SUBSTITUTED HOMOLOGS BY THE VAPOR PHASE PYROLYTIC DEACYLOXYATION OF A DIACYL CYANIDE AT A TEMPERATURE OF 300 TO 800* C., THE STEP OF RAPIDLY CONDENSING THE HOT PYROLYSIS VAPORS BY BRINGING A STREAM OF HOT PYROLYSIS VAPORS INTO CONCURRENT FLOW WITH A MOVING STREAM OF A COLD INERT QUENCH LIQUID, THE WEIGHT RATIO OF QUENCH LIQUID TO PYROLYSIS PRODUCT BEING AT LEAST 50 TO 1 AND THE SAID QUENCH LIQUID CONTAINING AN INERT LIQUID AROMATIC COMPOUND AND BEING AT A TEMPERATURE NOT HIGHER THAN ROOM TEMPERATURE.
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) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |