US3232976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur trioxide sulfation and sulfonation
Assignee: Kao USA Inc
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Filing: 1964-06-04
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Granted: 1966-02-01
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Expires: 1984-06-04
Abstract
No abstract record available.
Inventors
- 👤 John W Lohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:49
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06; C07C303/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF REACTING SULFUR TRIOXIDE WITH A MATERIAL SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC ALCOHOLS HAVING ABOUT 8-18 CARBON ATOMS PER MOLECULE, ETHOXY DERIVATIVES THEREOF AND ALKYL BENZENES HAVING ABOUT 11-15 CARBON ATOMS IN THE ALKYL GROUP WHICH COMPRISES, PUMPING SAID MATERIAL IN THE LIQUID STATE UNDER PRESSURE INTO A CONTACTING ZONE AS A CONTINUOUS TRUBULENT STREAM OF HIGH VELOCITY, CONTACTING SULFUR TRIOXIDE VAPOR UNDILUTED WITH ANY GASEOUS DILUENT WITH SAID CONTINUOUS STREAM AS SAID STREAM ENTERS SAID CONTACTING ZONE, THE PRESSURE OF THE SULFUR TRIOXIDE VAPOR WHERE IT COMES INTO CONTACT WITH SAID STREAM BEING SUBATMOSPHERIC, THE MOLAR RATE OF FLOW OF SAID MATERIAL INTO SAID CONTACTING ZONE SUBSTANTIALLY EXCEEDING THE MOLAR RATE OF FLOW OF SULFUR TRIOXIDE INTO SAID ZONE, AND RAPIDLY WITHDRAWING THE REACTION PRODUCTS FROM THE CONTACTING ZONE.
Claim 2
Independent Claim
134 words
THE METHOD OF REACTING SULFUR TRIOXIDE WITH A MATERIAL SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC ALCOHOLS HAVING ABOUT 8-18 CARBON ATOMS PER MOLECULE, ETHOXY DERIVATIVES THEREOF AND ALKYL BENZENES HAVING ABOUT 11-15 CARBON ATOMS IN THE ALKYL GROUP WHICH COMPRISES, PUMPING SAID MATERIAL IN THE LIQUID STATE UNDER PRESSURE INTO A CONTACTING ZONE AS A CONTINUOUS TRUBULENT STREAM OF HIGH VELOCITY, CONTACTING SULFUR TRIOXIDE VAPOR UNDILUTED WITH ANY GASEOUS DILUENT WITH SAID CONTINUOUS STREAM AS SAID STREAM ENTERS SAID CONTACTING ZONE, THE PRESSURE OF THE SULFUR TRIOXIDE VAPOR WHERE IT COMES INTO CONTACT WITH SAID STREAM BEING SUBATMOSPHERIC, THE MOLAR RATE OF FLOW OF SAID MATERIAL INTO SAID CONTACTING ZONE SUBSTANTIALLY EXCEEDING THE MOLAR RATE OF FLOW OF SULFUR TRIOXIDE INTO SAID ZONE, AND RAPIDLY WITHDRAWING THE REACTION PRODUCTS FROM THE CONTACTING ZONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |