US3390189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing pentaorganotriphosphines
Assignee: GE Chemicals Inc
•
Filing: 1963-05-22
•
Granted: 1968-06-25
•
Expires: 1983-05-22
Abstract
No abstract record available.
Inventors
- 👤 Max Van Ghemen
- 👤 Wiberg Egon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:02
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/504
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR THE PREPARATION OF THE COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE PREPARATION OF THE COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
US3242216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |