US2653972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing lower alkyl-, carboxymethyl-, diethers of polyoxyalkylene glycols
Assignee: Wyandotte Chemicals Corp
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Filing: 1950-06-09
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Granted: 1953-09-29
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Expires: 1970-06-09
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Ash
- 👤 Donald R Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/321; C08G65/325; C07; C07C; C07C51/00; C07C51/16; C07C51/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
THE METHOD OF MAKING MIXTURES OF LOWER ALKYL- CARBOXYMETHYL-, DIETHERS OF POLYOXYALKYLENE GLYCOLS OF THE TYPE FORMULA:
Claim 2
Independent Claim
17 words
THE METHOD OF MAKING MIXTURES OF LOWER ALKYL- CARBOXYMETHYL-, DIETHERS OF POLYOXYALKYLENE GLYCOLS OF 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) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |