US3705146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formaldehyde adducts of saccharides
Assignee: Dow Chemical Co
•
Filing: 1969-12-15
•
Granted: 1972-12-05
•
Expires: 1989-12-15
Abstract
Abstract FORMALDEHYDE ADDUCTS OF ALIPHATIC POLYHYDROXY ALCOHOLS HAVING THE GENERAL FORMULA R(O(CH2O)XH)Y WHEREIN EACH X IS INDEPENDENTLY AN INTEGER SUCH THAT THE AVERAGE X IS AT LEAST 3, EACH Y IS AN INTEGER NOT LESS THAN 3, AND R IS THE RESIDUE FORMED BY THE REMOVAL OF THE HYDROXYL GROUPS FROM AN ALIPHATIC POLYHYDROXY ALCOHOL. SUCH ADDUCTS MAY BE USED IN PLACE OF CONVENTION SOURCES OF FORMALDEHYDE TO PREPARE OR CURE PHENOLIC RESINS.
Inventors
- 👤 Harry A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:43
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/12; C08L; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |