US3275676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing cyclobutene-1, 2-dicyanide
Assignee: Standard Oil Co
•
Filing: 1963-09-30
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Granted: 1966-09-27
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Janice L Greene
- 👤 Norman W Standish
- 👤 Nancy R Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:14
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
THE METHOD WHICH COMPRISES REACTING CYCLOBUTANE1,2-DICHLORO-1,2-DICYANIDE WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A ZINC-COPPER COUPLE AND RANEY NICKEL IN A SOLVENT AND RECOVERING AS THE PRODUCT CYCLOBUTENE-1,2-DICYANINE HAVING THE FOLLOWING FORMULA
Claim 2
Independent Claim
34 words
THE METHOD WHICH COMPRISES REACTING CYCLOBUTANE1,2-DICHLORO-1,2-DICYANIDE WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A ZINC-COPPER COUPLE AND RANEY NICKEL IN A SOLVENT AND RECOVERING AS THE PRODUCT CYCLOBUTENE-1,2-DICYANINE HAVING THE FOLLOWING FORMULA
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |