Patent US2278620A successfully refreshed from Google Patents.
Patent US2931836A successfully refreshed from Google Patents.
US2931836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for aromatic alkynyl ethers
Assignee: —
•
Filing: —
•
Granted: 1960-04-05
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:37
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/15; C07C43/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
THE METHOD WHICH COMPRISES CONTACTING AN A,B-ACETYLENIC AROMATIC SULFONATE WITH A PHENOL AND A BASE IN AQUEOUS SOLUTION AT A TEMPERATURE ABOVE 40*C., AND ISOLATING FROM THE RESULTING REACTION MIXTURE AND AROMATIC ALKYLNYL ETHER.
Claim 2
Independent Claim
34 words
THE METHOD WHICH COMPRISES CONTACTING AN A,B-ACETYLENIC AROMATIC SULFONATE WITH A PHENOL AND A BASE IN AQUEOUS SOLUTION AT A TEMPERATURE ABOVE 40*C., AND ISOLATING FROM THE RESULTING REACTION MIXTURE AND AROMATIC ALKYLNYL ETHER.
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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |