US2813113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making azelaic acid
Assignee: Emery Oleochemicals LLC
•
Filing: 1953-05-07
•
Granted: 1957-11-12
•
Expires: 1973-05-07
Abstract
No abstract record available.
Inventors
- 👤 Charles G Goebel
- 👤 Alexander C Brown
- 👤 Herman F Oehlschlaeger
- 👤 Richard P Rolfes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:55
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
THE METHOD OF FORMING TWO TEMINAL CARBOXYLIC ACID GROUPS IN PLACE OF THE DOUBLE BONDS OF UNSATURATED FATTY BODIES OF THE CLASS CONSISTING OF UNSATURATED FATTY ACIDS OF 10-24 CARBON ATOMS CHAIN LENGTH AND ESTERS, NITRILES, AMIDES AND SOAPS FORMED BY MODIFICATION OF THE CARBOXYLIC ACID GROUP OF SAID ACIDS, SAID METHOD COMPRISING CIRCULATING A BODY OF GASEOUS OXYGEN CYCLICALLY THROUGH AN OZONE GENERATING ZONE AND THROUGH AN OZONE ABSORBING ZONE, PASSING THE FATTY COMPOUND THROUGH THE ABSORBING ZONE AND EXPOSING IT TO THE OZONIZED OXYGEN GAS WHEREBY THE OZONE REACTS WITH THE FATTY COMPOUND TO FORM OZONIDES THEREOF, CONTROLLING THE TEMPERATURE OF THE REACTION SO THAT IT DOES NOT EXCEED SUBSTANTIALLY 45*C., WITHDRAWING OXYGEN GAS WHICH CONTAINS SUBSTANTIALLY NO OZONE FROM THE CIRCULATING BODY OF OXYGEN GAS AND ADDING TO THE CIRCULATING BODY A VOLUME OF OXYGEN GAS EQUAL TO THAT OF THE GAS WITHDRAWN AND THAT REMOVED AS OZONE, THE OXYGEN
Claim 2
Independent Claim
153 words
THE METHOD OF FORMING TWO TEMINAL CARBOXYLIC ACID GROUPS IN PLACE OF THE DOUBLE BONDS OF UNSATURATED FATTY BODIES OF THE CLASS CONSISTING OF UNSATURATED FATTY ACIDS OF 10-24 CARBON ATOMS CHAIN LENGTH AND ESTERS, NITRILES, AMIDES AND SOAPS FORMED BY MODIFICATION OF THE CARBOXYLIC ACID GROUP OF SAID ACIDS, SAID METHOD COMPRISING CIRCULATING A BODY OF GASEOUS OXYGEN CYCLICALLY THROUGH AN OZONE GENERATING ZONE AND THROUGH AN OZONE ABSORBING ZONE, PASSING THE FATTY COMPOUND THROUGH THE ABSORBING ZONE AND EXPOSING IT TO THE OZONIZED OXYGEN GAS WHEREBY THE OZONE REACTS WITH THE FATTY COMPOUND TO FORM OZONIDES THEREOF, CONTROLLING THE TEMPERATURE OF THE REACTION SO THAT IT DOES NOT EXCEED SUBSTANTIALLY 45*C., WITHDRAWING OXYGEN GAS WHICH CONTAINS SUBSTANTIALLY NO OZONE FROM THE CIRCULATING BODY OF OXYGEN GAS AND ADDING TO THE CIRCULATING BODY A VOLUME OF OXYGEN GAS EQUAL TO THAT OF THE GAS WITHDRAWN AND THAT REMOVED AS OZONE, THE OXYGEN
References Cited (Backward Citations)
GB191215440A
Cited
US1210949A
Cited
US1297716A
Cited
US2083572A
Cited
DE565158C
Cited
US2004586A
Cited
US2177494A
Cited
US2314827A
Cited
US2292950A
Cited
US2601223A
Cited
US2665280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |