US2520671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhydroxy compounds
Assignee: General Mills Inc
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Filing: 1946-10-24
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Granted: 1950-08-29
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Expires: 1966-10-24
Abstract
No abstract record available.
Inventors
- 👤 Wittcoff Harold
- 👤 Roach John Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:00
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
PROCESS OF PRODUCING A POLYHYDRIC ALCOHOL FROM A PRODUCT RESULTING FROM THE CONDENSATION OF A CARBONYL-CONTAINING COMPOUND AND FORMALDEHYDE UNDER AQUEOUS ALKALINE CONDITIONS, WHICH COMPRISES ADDING TO THE CRUDE REACTION MIXTURE CONTAINING THE CONDENSATION PRODUCT AND THE ALKALINE CATALYST, CAUSTIC ALKALI AND A MONOFUNCTIONAL ALKYLATING AGENT CONTAINING AT LEAST TWO HYDROXYL GROUPS, AND ALLOWING THE REACTION TO PROCEED TO ETHERIFY HYDROXYL GROUPS OF SAID CONDENSATION PRODUCT WITH SAID MONOFUNCTIONAL ALKYLATING AGENT.
Claim 2
Dependent Claim
71 words
PROCESS OF PRODUCING A POLYHYDRIC ALCOHOL FROM A PRODUCT RESULTING FROM THE CONDENSATION OF A CARBONYL-CONTAINING COMPOUND AND FORMALDEHYDE UNDER AQUEOUS ALKALINE CONDITIONS, WHICH COMPRISES ADDING TO THE CRUDE REACTION MIXTURE CONTAINING THE CONDENSATION PRODUCT AND THE ALKALINE CATALYST, CAUSTIC ALKALI AND A MONOFUNCTIONAL ALKYLATING AGENT CONTAINING AT LEAST TWO HYDROXYL GROUPS, AND ALLOWING THE REACTION TO PROCEED TO ETHERIFY HYDROXYL GROUPS OF SAID CONDENSATION PRODUCT WITH SAID MONOFUNCTIONAL ALKYLATING AGENT.
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) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |