US2908681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of 2-hydroxypropylsucrose
Assignee: Dow Chemical Co
•
Filing: 1957-02-25
•
Granted: 1959-10-13
•
Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Anderson
- 👤 Juel L Melstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:55
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H15/06; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
AN ESTER CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
6 words
AN ESTER CORRESPONDING TO THE 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) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |