Patent US3263401A successfully refreshed from Google Patents.
US3263401A
Expired / Lapsed
US
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Chromatography
Assignee: Alltech Associates Inc
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Filing: 1962-11-21
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Granted: 1966-08-02
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Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 Walter R Supina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:33
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/286; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3242; B01J20/3268; B01J20/3272; B01J2220/00; B01J2220/50; B01J2220/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE METHOD OF SEPARATING COMPLEX MIXTURES INTO THEIR COMPONENTS WHICH COMPRISES PASSING SAID MIXTURE IN A VAPOR PHASE WITH AN INERT CARRIER GAS THROUGH A LIQUID PARTITION ZONE CONTAINING ON AN INERT CARRIER A FILM OF A STATIONARY PHASE COMPRISING THE POLYESTER REACTION PRODUCT OF A SILICON-CONTAINING COMPOUND, A POLYOL AND A POLYCARBOXYLIC ACID.
Claim 2
Independent Claim
54 words
THE METHOD OF SEPARATING COMPLEX MIXTURES INTO THEIR COMPONENTS WHICH COMPRISES PASSING SAID MIXTURE IN A VAPOR PHASE WITH AN INERT CARRIER GAS THROUGH A LIQUID PARTITION ZONE CONTAINING ON AN INERT CARRIER A FILM OF A STATIONARY PHASE COMPRISING THE POLYESTER REACTION PRODUCT OF A SILICON-CONTAINING COMPOUND, A POLYOL AND A POLYCARBOXYLIC ACID.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |