US2812360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for stabilizing polyglycol compounds
Assignee: Union Carbide Corp
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Filing: 1955-11-04
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Granted: 1957-11-05
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Expires: 1975-11-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward J Mills
- 👤 William J Tapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:48
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/02; C08G; C08G65/00; C08G65/02; C08G65/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A METHOD OF STABILIZING POLYETHYLENE GLYCOL COMPOUNDS CONTAINING ACETAL IMPURITIES, WHICH METHOD CONSISTS OF TREATING SAID COMPOUNDS TO HYDROLYZE THE ACETAL IMPURITIES CONTAINED THEREIN, AND SUBSEQUENTLY REMOVING THE RESULTANT PRODUCT.
Claim 2
Independent Claim
30 words
A METHOD OF STABILIZING POLYETHYLENE GLYCOL COMPOUNDS CONTAINING ACETAL IMPURITIES, WHICH METHOD CONSISTS OF TREATING SAID COMPOUNDS TO HYDROLYZE THE ACETAL IMPURITIES CONTAINED THEREIN, AND SUBSEQUENTLY REMOVING THE RESULTANT PRODUCT.
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) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |