Patent US2688124A successfully refreshed from Google Patents.
US2465486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 4, 4'-divinyl-biphenyl
Assignee: RCA Corp
•
Filing: 1945-11-24
•
Granted: 1949-03-29
•
Expires: 1965-11-24
Abstract
No abstract record available.
Inventors
- 👤 Rosenthal Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:51
CPC Classifications
C; C08; C08F; C08F112/00; C08F112/34; C07; C07C; C07C1/00; C07C1/20; C07C1/24; C08F112/02; C08F112/32; C07C2521/00; C07C2521/02; C07C2521/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1772895A
Cited
US1870852A
Cited
GB481725A
Cited
US2166125A
Cited
US2181102A
Cited
US2345625A
Cited
US2390368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-28 | 1952-09-27 | 1953-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-28 | 1956-09-27 | 1957-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-28 | 1960-09-27 | 1961-03-29 | $7700.00 | Window Closed / Lapsed |