US3033878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aryl chromium compounds and their preparation
Assignee: Monsanto Chemicals Ltd
•
Filing: 1958-06-02
•
Granted: 1962-05-08
•
Expires: 1978-06-02
Abstract
No abstract record available.
Inventors
- 👤 Harold H Zeiss
- 👤 Herwig Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:15
CPC Classifications
C; C07; C07F; C07F11/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
4 words
TRIPHENYLCHROMIUM SOLVATED WITH TETRAHYDROFURAN.
References Cited (Backward Citations)
US2873275A
Cited
US2838508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |