Patent US3225112A successfully refreshed from Google Patents.
US3225112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 2,3-dialkyl-2-alkenes
Assignee: Sinclair Research Inc
•
Filing: 1962-06-25
•
Granted: 1965-12-21
•
Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 William D Hoffman
- 👤 Robert M Eichhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:24
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/26; C07C1/30; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A METHOD FOR THE PRODUCTION OF 2,3-DIALKYL-2-ALKENES WHICH COMPRISES CONTACTING WITH A CATALYST CONSISTING ESSENTIALLY OF ELEMENTAL IRON AT A TEMPERATURE OF ABOUT 400 TO 1000*F., A HALOGENATGED HYDROCARBON FEED HAVING THE STRUCTURAL FORMULA:
Claim 2
Independent Claim
34 words
A METHOD FOR THE PRODUCTION OF 2,3-DIALKYL-2-ALKENES WHICH COMPRISES CONTACTING WITH A CATALYST CONSISTING ESSENTIALLY OF ELEMENTAL IRON AT A TEMPERATURE OF ABOUT 400 TO 1000*F., A HALOGENATGED HYDROCARBON FEED HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |