US3752780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated methylol phenols
Assignee: SCHENECTADY CHEM INC US
•
Filing: 1971-04-26
•
Granted: 1973-08-14
•
Expires: 1991-04-26
Abstract
Abstract DIMETHYLOL ALKYL PHENOLS AND LOW POLYMERS THEREOF HAVING AN AVERAGE OF 60 TO 85% OF THE AVAILABLE METHYLOL GROUPS REPLACED BY HALOMETHYL ARE PREPARED. THEY ARE USEFUL IN VULCANIZING VARIOUS ELASTOMERS AT ROOM (AMBIENT) TEMPERATURES. PREFERABLY THE HALOGEN IS BROMINE. ALSO PREFERABLY A ZINC COMPOUND, MOST PREFERABLY ZINC OXIDE, IS PRESENT TO SPEED UP THE VULCANIZATION. THE VULCANIZATION OF LIQUID RUBBERS IS PARTICULARLY EFFECTIVE.
Inventors
- 👤 K Petersen
- 👤 C Blowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C07; C07C; C07C39/00; C07C39/24; C08L; C08L21/00
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |