US2921954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel vinyl borons and method of preparation
Assignee: Primerica Inc
•
Filing: 1957-07-12
•
Granted: 1960-01-19
•
Expires: 1977-07-12
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Ramsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:10
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C08; C08F; C08F30/00; C08F30/04; C08F30/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PROCESS FOR PREPARING VINYLICOBORON COMPOUNDS WHICH COMPRISES REACTING A VINYLICMAGNESIUM CHLORIDE WHEREIN THE VINYLIC GROUP HAS UP TO 8 CARBON ATOMS AND IS SELECTED FROM THE CLASS CONSISTING OF ALKENYL, CYCLOALKENYL, AND ARALKENYL GROUPS, WITH A BORON REACTANT HAVING THE FORMULA:
Claim 2
Dependent Claim
42 words
A PROCESS FOR PREPARING VINYLICOBORON COMPOUNDS WHICH COMPRISES REACTING A VINYLICMAGNESIUM CHLORIDE WHEREIN THE VINYLIC GROUP HAS UP TO 8 CARBON ATOMS AND IS SELECTED FROM THE CLASS CONSISTING OF ALKENYL, CYCLOALKENYL, AND ARALKENYL GROUPS, WITH A BORON REACTANT HAVING THE FORMULA:
References Cited (Backward Citations)
US2346155A
Cited
US2413718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |