Patent US1548515A successfully refreshed from Google Patents.
Patent US2965687A successfully refreshed from Google Patents.
US2965687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective sorption of organic vapors
Assignee: Gas Council
•
Filing: 1959-05-19
•
Granted: 1960-12-20
•
Expires: 1979-05-19
Abstract
No abstract record available.
Inventors
- 👤 Roberts Arthur Loten
- 👤 Cowan Colin Thomas
- 👤 White Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:47
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/46; Y; Y10; Y10S; Y10S95/00; Y10S95/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR THE SEPARATION OF AROMATIC HYDROCARBONS FROM GASES AND VAPORS CONTAINING A MEMBER OF THE GROUP CONSISTING OF AROMATIC HYDROCARBONS AND A MIXTURE OF AROMATIC HYDROCARBONS AND ALIPHATIC HYDROCARBONS, WHICH PROCESS COMPRISES THE SELECTIVE SORPTION OF THE AROMATIC HYDROCARBON ON A SORBENT CONSISTING ESSENTIALLY OF A QUATERNARY AMMONIUM DERIVATIVE OF A CLAY MINERAL POSSESSING ION-EXCHANGE CAPABILITIES AND EXPANDING LATTICES, SAID QUATERNARY AMMONIUM CONSISTITUENT OF THE ORGANO CLAY DERIVATIVE CONTAINING NOT LESS THAN A TOTAL OF 20 CARBON ATOMS AND BEING PERSENT IN AN AMOUNT OF FROM 17 TO 36 PERCENT BY WEIGHT ON THE WEIGHT OF THE DERIVATIVES.
Claim 2
Dependent Claim
100 words
A PROCESS FOR THE SEPARATION OF AROMATIC HYDROCARBONS FROM GASES AND VAPORS CONTAINING A MEMBER OF THE GROUP CONSISTING OF AROMATIC HYDROCARBONS AND A MIXTURE OF AROMATIC HYDROCARBONS AND ALIPHATIC HYDROCARBONS, WHICH PROCESS COMPRISES THE SELECTIVE SORPTION OF THE AROMATIC HYDROCARBON ON A SORBENT CONSISTING ESSENTIALLY OF A QUATERNARY AMMONIUM DERIVATIVE OF A CLAY MINERAL POSSESSING ION-EXCHANGE CAPABILITIES AND EXPANDING LATTICES, SAID QUATERNARY AMMONIUM CONSISTITUENT OF THE ORGANO CLAY DERIVATIVE CONTAINING NOT LESS THAN A TOTAL OF 20 CARBON ATOMS AND BEING PERSENT IN AN AMOUNT OF FROM 17 TO 36 PERCENT BY WEIGHT ON THE WEIGHT OF THE DERIVATIVES.
References Cited (Backward Citations)
US2531427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |