Patent US3695853A successfully refreshed from Google Patents.
US3695853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transition metal complexes of phosphine
Assignee: EIDP Inc
•
Filing: 1970-04-01
•
Granted: 1972-10-03
•
Expires: 1990-04-01
Abstract
Abstract TRANSITION METAL COMPLEXES OF PHOSPHINE ARE FORMED BY DISPLACEMENT OF LIGANDS FROM CERTAIN TRANSITION METAL COMPLEXES WITH PHOSPHINE. THE PRODUCTS ARE USFUL AS SOURCES OF PHOSPHINE AND AS CATALYSTS FOR THE POLYMERIZATION OF OLEFINS.
Inventors
- 👤 Frank Karl Klanberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:03
CPC Classifications
C; C01; C01B; C01B6/00; B; B01; B01J; B01J31/00; B01J31/16; B01J31/24; C07; C07F; C07F11/00; C07F11/005; C07F13/00; C07F13/005; C07F15/00; C07F15/02; C07F15/025; C07F15/04; C07F15/045; C07F15/06; C07F15/065; C07F9/00; C07F9/66; C07F9/70; C07F9/90; C08; C08F; C08F4/00; B01J2231/00; B01J2231/10; B01J2231/12; B01J2231/20; B01J2531/00; B01J2531/60; B01J2531/70; B01J2531/80; B01J2531/84; B01J2531/847; B01J31/18; B01J31/1845; B01J31/185; B01J31/1895; B01J31/20; B01J31/22; B01J31/2282; B01J31/2404
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |