Patent US2986568A successfully refreshed from Google Patents.
US2986568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of butyrolactones
Assignee: Ethyl Corp
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Filing: 1956-04-26
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Granted: 1961-05-30
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Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 James D Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:24
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07D315/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR THE MANUFACTURE OF BUTYROLACTONES WHICH COMPRISES REACTING, IN ONE STEP, A COMPOUND FROM THE GROUP CONSISTING OF BROMOACETIC ACID, LOWER ALKYL ESTERS THEREOF, AND BROMOACETIC ANHYDRIDE WITH UP TO AND INCLUDING ESSENTIALLY THE THEORETICAL STOICHIOMETRIC EQUIVALENT OF AN ALPHA OLEFIN SELECTED FROM THE GROUP CONSISTING OF ETHYLENE, PROPYLENE, ISOBUTYLENE, N-PENTENE-1, OCTENE-1, VINYL CHLORIDE, VINYLIDENE CHLORIDE, ALLYL CHLORIDE, 1-FLUOROPROPYLENE, 1,1-DIFLUOROPROPYLENE, 1-FLUORO-N-PENTENE-1, ALPHA-FLUOROSTYRENE, ALPHA,BETA-DIFLUOROSTYRENE, 2,6-DICHLOROSTYRENE, STYRENE, AND VINYL FLUORIDE AT A PRESSURE BELOW ABOUT 50 ATMOSPHERES, AT A TEMPERATURE ABOVE ABOUT 150*C., IN THE PRESENCE OF A FREE RADICAL INITIATING CATALYST, AND IN A SYSTEM WHICH IS ESSENTIALLY INERT TO THE REACTANTS AND CATALYST UNDER THE REACTION CONDITIONS.
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE MANUFACTURE OF BUTYROLACTONES WHICH COMPRISES REACTING, IN ONE STEP, A COMPOUND FROM THE GROUP CONSISTING OF BROMOACETIC ACID, LOWER ALKYL ESTERS THEREOF, AND BROMOACETIC ANHYDRIDE WITH UP TO AND INCLUDING ESSENTIALLY THE THEORETICAL STOICHIOMETRIC EQUIVALENT OF AN ALPHA OLEFIN SELECTED FROM THE GROUP CONSISTING OF ETHYLENE, PROPYLENE, ISOBUTYLENE, N-PENTENE-1, OCTENE-1, VINYL CHLORIDE, VINYLIDENE CHLORIDE, ALLYL CHLORIDE, 1-FLUOROPROPYLENE, 1,1-DIFLUOROPROPYLENE, 1-FLUORO-N-PENTENE-1, ALPHA-FLUOROSTYRENE, ALPHA,BETA-DIFLUOROSTYRENE, 2,6-DICHLOROSTYRENE, STYRENE, AND VINYL FLUORIDE AT A PRESSURE BELOW ABOUT 50 ATMOSPHERES, AT A TEMPERATURE ABOVE ABOUT 150*C., IN THE PRESENCE OF A FREE RADICAL INITIATING CATALYST, AND IN A SYSTEM WHICH IS ESSENTIALLY INERT TO THE REACTANTS AND CATALYST UNDER THE REACTION CONDITIONS.
References Cited (Backward Citations)
US2485100A
Cited
US2569064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |