US2912439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Divinyl-1, 4-dioxanes and cross-linked polymers thereof
Assignee: Eastman Kodak Co
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Filing: 1956-12-17
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Granted: 1959-11-10
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Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Robert H Hasek
- 👤 James E Hardwicke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:58
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/10; C07D319/12; C08; C08F; C08F24/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR PREPARING A DIVIN-1,4-DIOXANE SELECTED FROM THE GROUP CONSISTING OF 2,5-DIVINYL-1,4-DIOXANE AND 2,6-DIVINYL-1,4-DIOXANE, WHICH COMPRISES HEATING A MIXTURE COMPRISING A 2-BUTENE-1,4-DIOL IN THE PRESENCE OF A MERCURY SALT SELECTED FROM THE GROUP CONSISTING OF A SULFATE OF MERCURY, AN OXIDE OF MERCURY, A NITRATE OF MERCURY, A CHLORIDE OF MERCURY AND A ACETATE OF MERCURY, AT FROM 50* TO 200* C., DISTILLING OFF THE WATER OF REACTION AS FORMED, AND SEPARATING THE FORMED DIVINYL-1,4DIOXANE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
80 words
A PROCESS FOR PREPARING A DIVIN-1,4-DIOXANE SELECTED FROM THE GROUP CONSISTING OF 2,5-DIVINYL-1,4-DIOXANE AND 2,6-DIVINYL-1,4-DIOXANE, WHICH COMPRISES HEATING A MIXTURE COMPRISING A 2-BUTENE-1,4-DIOL IN THE PRESENCE OF A MERCURY SALT SELECTED FROM THE GROUP CONSISTING OF A SULFATE OF MERCURY, AN OXIDE OF MERCURY, A NITRATE OF MERCURY, A CHLORIDE OF MERCURY AND A ACETATE OF MERCURY, AT FROM 50* TO 200* C., DISTILLING OFF THE WATER OF REACTION AS FORMED, AND SEPARATING THE FORMED DIVINYL-1,4DIOXANE FROM THE REACTION MIXTURE.
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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |