Patent US3239538A successfully refreshed from Google Patents.
US3239538A
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US
⏱️ 0.0 years remaining
2, 2-dichloro-3(2h)-furanones and the preparation of aryl-pyruvic acid therefrom
Assignee: Monsanto Co
•
Filing: 1965-05-10
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Granted: 1966-03-08
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Speziale Angelo John
- 👤 Lowell R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:56
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/66; C07C; C07C51/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Independent Claim
92 words
THE METHOD OF MAKING A COMPOUND OF THE FORMULA WHEREIN N IS A NUMBER FROM 0 TO 1, WHEREIN R IS HYDROCARBYL HAVING 6 TO 12 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF (A) PHENYL, ALKYL SUBSTITUTED PHENYL, BIPHENYLYL, NAPHTHYL, AND METHYLNAPHTHYL, AND (B) SAID HYDROCARBYL (A) BEING SUBSTITUTED ON THE AROMATIC CARBOCYCLIC NUCLEUS THEREOF WITH SUBSTITUENTS OF THE CLASS CONSISTING OF CHLORINE AND BROMINE, AND WHEREIN -N< IS A SECONDARY AMINE RESIDUE SELECTED FROM THE GROUP CONSISTING OF A (1) SATURATED SINGLE RING HETEROCYCLIC AMINE RESIDUE OF THE FORMULA
Claim 4
Independent Claim
92 words
THE METHOD OF MAKING A COMPOUND OF THE FORMULA WHEREIN N IS A NUMBER FROM 0 TO 1, WHEREIN R IS HYDROCARBYL HAVING 6 TO 12 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF (A) PHENYL, ALKYL SUBSTITUTED PHENYL, BIPHENYLYL, NAPHTHYL, AND METHYLNAPHTHYL, AND (B) SAID HYDROCARBYL (A) BEING SUBSTITUTED ON THE AROMATIC CARBOCYCLIC NUCLEUS THEREOF WITH SUBSTITUENTS OF THE CLASS CONSISTING OF CHLORINE AND BROMINE, AND WHEREIN -N< IS A SECONDARY AMINE RESIDUE SELECTED FROM THE GROUP CONSISTING OF A (1) SATURATED SINGLE RING HETEROCYCLIC AMINE RESIDUE OF THE FORMULA
Claim 5
Independent Claim
33 words
THE METHOD OF CHAIN 11 ATTENDED BY THE STEP OF HYDROLYZING THE 2,2-DICHLORO-3(2H)-FURANONE PRODUCT THEREOF WHEREIN N IS 0 IN THE PRESENCE OF A MINERAL ACID TO AN ARYL-PYRUVIC ACID OF THE FORMULA
Claim 6
Independent Claim
33 words
THE METHOD OF CHAIN 11 ATTENDED BY THE STEP OF HYDROLYZING THE 2,2-DICHLORO-3(2H)-FURANONE PRODUCT THEREOF WHEREIN N IS 0 IN THE PRESENCE OF A MINERAL ACID TO AN ARYL-PYRUVIC ACID OF THE FORMULA
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |