Patent US3287455A successfully refreshed from Google Patents.
US3287455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal pyridine compounds
Assignee: Diamond Shamrock Corp
•
Filing: 1962-12-03
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Granted: 1966-11-22
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Malkin Irving
- 👤 Taylor Kirman
- 👤 Frank W Hengeveld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:52
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/60; C07D213/78; C07D213/79; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/24; C07D215/26; C07D215/30; C07F; C07F1/00; C07F1/005; C07F11/00; C07F11/005; C07F15/00; C07F15/02; C07F15/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
TRICHLOROTRIS(4-VINYLPYRIDINE)CHROMIUM III
Claim 2
Dependent Claim
2 words
TRICHLOROTRIS(4-VINYLPYRIDINE)CHROMIUM III
References Cited (Backward Citations)
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US2827462A
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Cited
US2853416A
Cited
US2876227A
Cited
US2876226A
Cited
US2903456A
Cited
US2958624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |