US2659754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of carboxymethyl diethers of ethylene glycols to remove hno3
Assignee: Wyandotte Chemicals Corp
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Filing: 1952-05-22
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Granted: 1953-11-17
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Expires: 1972-05-22
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Ash
- 👤 Mason H Earing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:04
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/487
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
20 words
A METHOD FOR TREATING A MIXTURE CONSISTING ESSENTIALLY OF A CARBOXYMETHYL DIETHER OF AN ETHYLENE GLYCOL HAVING THE TYPE FORMULA:
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) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |