US3265714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dihalocarbene adducts
Assignee: Ethyl Corp
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Filing: 1962-06-28
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Granted: 1966-08-09
•
Expires: 1982-06-28
Abstract
No abstract record available.
Inventors
- 👤 Gene C Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:36
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/94; C07C; C07C17/00; C07C17/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS INVOLVING THE GENERATION OF DIHALOCARBENE AND THE PROXIMATE FORMATION OF DIHALOCARBENE ADDUCTS WHICH COMPRISES THE STEP OF REACTING TOGETHER IN AN ETHER AN INITIALLY ESSENTIALLY ANHYDROUS MIXTURE OF AN ALKALI METAL HYDROXIDE, A HALOFORM AND A DIHALOCARBENE ACCEPTOR; SAID ETHER HAVING A RATIO OF CARBON ATOMS TO OXYGEN ATOMS OF UP TO ABOUT 3:1 AND BEING SELECTED FROM THE GROUP CONSISTING OF (1) R1-O-R2 WHERE R1 AND R2 ARELOWER ALKYL OR PHENYL, (2) TETRAHYDROFURAN AND RING ALKYLATED DERIVATIVES THEREOF, (3) DIOXANE, (4) DIOXOLANE, (5) TETRAHYDROPYRAN, (5( DILOWER ALKYL ETHERS OF ETHYLENE GLYCOL, AND (7) DILOWER ALKYL ETHERS OF POLYETHYLENE GLYCOL, SAID HALOFORM CONTAINING AT LEAST ONE HALOGEN ATOM SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, SAID ETHER BEING AN ETHER OF A SATURATED ALIPHATIC POLYHYDROXY ALCOHOL HAVING FROM ABOUT 4 TO ABOUT 50 CARBON ATOMS.
Claim 2
Dependent Claim
139 words
A PROCESS INVOLVING THE GENERATION OF DIHALOCARBENE AND THE PROXIMATE FORMATION OF DIHALOCARBENE ADDUCTS WHICH COMPRISES THE STEP OF REACTING TOGETHER IN AN ETHER AN INITIALLY ESSENTIALLY ANHYDROUS MIXTURE OF AN ALKALI METAL HYDROXIDE, A HALOFORM AND A DIHALOCARBENE ACCEPTOR; SAID ETHER HAVING A RATIO OF CARBON ATOMS TO OXYGEN ATOMS OF UP TO ABOUT 3:1 AND BEING SELECTED FROM THE GROUP CONSISTING OF (1) R1-O-R2 WHERE R1 AND R2 ARELOWER ALKYL OR PHENYL, (2) TETRAHYDROFURAN AND RING ALKYLATED DERIVATIVES THEREOF, (3) DIOXANE, (4) DIOXOLANE, (5) TETRAHYDROPYRAN, (5( DILOWER ALKYL ETHERS OF ETHYLENE GLYCOL, AND (7) DILOWER ALKYL ETHERS OF POLYETHYLENE GLYCOL, SAID HALOFORM CONTAINING AT LEAST ONE HALOGEN ATOM SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, SAID ETHER BEING AN ETHER OF A SATURATED ALIPHATIC POLYHYDROXY ALCOHOL HAVING FROM ABOUT 4 TO ABOUT 50 CARBON ATOMS.
References Cited (Backward Citations)
US2950328A
Cited
US2933544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |