Patent US2889357A successfully refreshed from Google Patents.
US2889357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alpha-chloracrylic acid esters
Assignee: BASF SE
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Filing: 1956-11-06
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Granted: 1959-06-02
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Expires: 1976-11-06
Abstract
No abstract record available.
Inventors
- 👤 Friederich Herbert
- 👤 Minsinger Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:26
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/62; C07C69/65; C07C69/653
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD OF MANUFACTURING ALPHA-CHLORACRYLIC ACID ESTERS OF LOWER ALKANOLS WHICH COMPRISES REACTING AN ESTER OF ACRYLIC ACID AND A LOWER ALKANOL AND CHLORINE IN THE GAS PHASE IN THE MOLAR RATIO OF 0.8 TO 1.8 MOLS OF CHLORINE PER MOL OF THE ESTER AT A TEMPERATURE BETWEEN 200* AND 300*C. IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF CHLORIDES AND BROMIDES OF COPPER, CALCIUM, STRONTIUM, BARIUM, ZINC, IRON, NICKEL AND COBALT.
Claim 2
Independent Claim
76 words
A METHOD OF MANUFACTURING ALPHA-CHLORACRYLIC ACID ESTERS OF LOWER ALKANOLS WHICH COMPRISES REACTING AN ESTER OF ACRYLIC ACID AND A LOWER ALKANOL AND CHLORINE IN THE GAS PHASE IN THE MOLAR RATIO OF 0.8 TO 1.8 MOLS OF CHLORINE PER MOL OF THE ESTER AT A TEMPERATURE BETWEEN 200* AND 300*C. IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF CHLORIDES AND BROMIDES OF COPPER, CALCIUM, STRONTIUM, BARIUM, ZINC, IRON, NICKEL AND COBALT.
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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |