US2602789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ether-esters of polyhydroxy compounds
Assignee: Individual
•
Filing: 1949-08-23
•
Granted: 1952-07-08
•
Expires: 1969-08-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Schwartz
- 👤 Eugene A Talley
- 👤 Charles H Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/16; C08B13/00; C08B37/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
AN ETHER-ESTER OF AN ALIPHATIC POLYHYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF STARCH CONTAINING AT LEAST 1.3 ALLYL GROUPS PER GLUCOSE UNIT, SUCROSE CONTAINING FROM 2 TO 7 ALLYL ETHER GROUPS PER MOLECULE, AND MANNITOL CONTAINING FROM 2 TO 5 ALLYL ETHER GROUPS PER MOLECULE, AND HAVING SUBSTANTIALLY ALL OF THE OTHER HYDROXYL GROUPS SUBSTITUTED BY A SATURATED CARBOXYLIC ESTER GROUP.
Claim 2
Dependent Claim
62 words
AN ETHER-ESTER OF AN ALIPHATIC POLYHYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF STARCH CONTAINING AT LEAST 1.3 ALLYL GROUPS PER GLUCOSE UNIT, SUCROSE CONTAINING FROM 2 TO 7 ALLYL ETHER GROUPS PER MOLECULE, AND MANNITOL CONTAINING FROM 2 TO 5 ALLYL ETHER GROUPS PER MOLECULE, AND HAVING SUBSTANTIALLY ALL OF THE OTHER HYDROXYL GROUPS SUBSTITUTED BY A SATURATED CARBOXYLIC ESTER GROUP.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |