Patent US3719509A successfully refreshed from Google Patents.
US3719509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stabilizing polymeric organic compositions with 3',5'-dibromo-2'-hydroxyacetophenone
Assignee: Buckman Laboratories International Inc
•
Filing: 1971-01-04
•
Granted: 1973-03-06
•
Expires: 1991-01-04
Abstract
Abstract THE PREPARATION OF 3'',5''-DIBROMO-2''-HYDROXYACETOPHENONE AND ITS USE AS AN ILTRAVIOLET LIGHT ABSORBER AND AS A FIRE RETARDANT FOR POLYMERIC AND ORGANIC COATING COMPOSITION ARE DESCRIBED.
Inventors
- 👤 S Buckman
- 👤 J Pera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:29
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/136; C07; C07C; C07C45/00; C07C45/61; C07C45/63
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |