US2806892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovering trimethylolethane by ethyl acetate extraction
Assignee: Heyden Newport Chemical Corp
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Filing: 1954-06-02
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Granted: 1957-09-17
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Expires: 1974-06-02
Abstract
No abstract record available.
Inventors
- 👤 Lorenzo Sylvio A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:21
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
IN A PROCESS OF RECOVERING TRIMETHYLOLETHANE FROM AQUEOUS LIQUORS CONTAINING, IN ADDITION TO TRIMETHYLOLETHANE, METAL FORMATE AND OTHER IMPURITIES RESULTING FROM
Claim 2
Dependent Claim
21 words
IN A PROCESS OF RECOVERING TRIMETHYLOLETHANE FROM AQUEOUS LIQUORS CONTAINING, IN ADDITION TO TRIMETHYLOLETHANE, METAL FORMATE AND OTHER IMPURITIES RESULTING FROM
References Cited (Backward Citations)
US2292926A
Cited
US2347312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |