US2985685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkanolamine aluminates as catalysts for ester redistribution
Assignee: Wyeth Holdings LLC
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Filing: 1960-05-02
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Granted: 1961-05-23
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Expires: 1980-05-02
Abstract
No abstract record available.
Inventors
- 👤 Walter M Thomas
- 👤 Stephen J Groszos
- 👤 Nancy E Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/069; B; B01; B01J; B01J31/00; B01J31/16; B01J31/18; B01J31/1805; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/223; B01J2231/00; B01J2231/40; B01J2531/00; B01J2531/02; B01J2531/0238; B01J2531/0241; B01J2531/0247; B01J2531/30; B01J2531/31; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
IN A METHOD OF EFFECTING ESTER REDISTRIBUTION BETWEEN TWO DIFFERENT ORGANIC DIESTERS, THE IMPROVEMENT WHICH CONSISTS IN USING AS A CATALYST FOR EFFECTING SAID ESTER REDISTRIBUTION AN ALUMINUM ESTER SELECTED FROM THE CLASS CONSISTING OF (A) ALUMINATES REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
42 words
IN A METHOD OF EFFECTING ESTER REDISTRIBUTION BETWEEN TWO DIFFERENT ORGANIC DIESTERS, THE IMPROVEMENT WHICH CONSISTS IN USING AS A CATALYST FOR EFFECTING SAID ESTER REDISTRIBUTION AN ALUMINUM ESTER SELECTED FROM THE CLASS CONSISTING OF (A) ALUMINATES REPRESENTED BY THE GENERAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |