Patent US3265744A successfully refreshed from Google Patents.
US3265744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dihalocarbene adducts
Assignee: Ethyl Corp
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Filing: 1962-09-07
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Granted: 1966-08-09
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Expires: 1982-09-07
Abstract
No abstract record available.
Inventors
- 👤 Gene C Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:01
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS INVOLVING THE GENERATION OF DIHALOCARBENE AND THE PROXIMATE FORMATION OF DIHALOCARBENE ADDUCTS WHICH COMPRISES THE STEP OF REACTING TOGETHER AN INITIALLY ESSENTIALLY ANHYDROUS MIXTURE OF AN ALKALI METAL HYDROXIDE, A HALOFORM, AND A DIHALOCARBENE ACCEPTOR IN A CYCLIC SULFONE SOLVENT FOR THE ORGANIC COMPONENTS O SAID MIXTURE; SAID HALOFORM CONTAINING AT LEAST 1 HALOGEN ATOM SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE AND SAID SULFONE HAVING A RATIO OF CARBON ATOMS TO SULFONE GROUPS OF LESS THAN AOUT 10:1 AND BEING SELECTED FROM THE GROUP CONSISTING OF (1) THIACYCLOALKANE DIOXIDE, (2) DITHIACYCLOALKANE, AND (3) THIACYCLOALKENE DIOXIDE.
Claim 2
Dependent Claim
100 words
A PROCESS INVOLVING THE GENERATION OF DIHALOCARBENE AND THE PROXIMATE FORMATION OF DIHALOCARBENE ADDUCTS WHICH COMPRISES THE STEP OF REACTING TOGETHER AN INITIALLY ESSENTIALLY ANHYDROUS MIXTURE OF AN ALKALI METAL HYDROXIDE, A HALOFORM, AND A DIHALOCARBENE ACCEPTOR IN A CYCLIC SULFONE SOLVENT FOR THE ORGANIC COMPONENTS O SAID MIXTURE; SAID HALOFORM CONTAINING AT LEAST 1 HALOGEN ATOM SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE AND SAID SULFONE HAVING A RATIO OF CARBON ATOMS TO SULFONE GROUPS OF LESS THAN AOUT 10:1 AND BEING SELECTED FROM THE GROUP CONSISTING OF (1) THIACYCLOALKANE DIOXIDE, (2) DITHIACYCLOALKANE, AND (3) THIACYCLOALKENE DIOXIDE.
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) | 1969-08-08 | 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 |