Patent US3574774A successfully refreshed from Google Patents.
US3574774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorobromocyclopentenes containing 4 to 7 bromine atoms
Assignee: Dow Chemical Co
•
Filing: 1969-03-13
•
Granted: 1971-04-13
•
Expires: 1989-03-13
Abstract
Abstract NEW COMPOUNDS ARE PROVIDED IN THE FORM OF FLUOROBROMOCYCLOPENTENES CHARACTERIZED BY THE FORMULA: (F)X,(BR)Z-CYCLOPENTENE WHEREIN X IS AN INTEGER FROM 1 TO 7, Z IS AN INTEGER FROM 1 TO 7 AND X+Z=8. THE COMPONUNDS ARE PREPARED BY FLUORINATING HEXABROMOCYCLOPENTADIENE WITH ANTIMONY TRIFLUORIDE.
Inventors
- 👤 Richard Garth Pews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:10
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C17/00; C07C17/013; C07C17/04; C07C23/00; C07C23/02; C07C23/08; C10M2211/00; C10M2211/02; C10N; C10N2040/00; C10N2040/06; Y; Y10; Y10T; Y10T74/00; Y10T74/12
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |