Patent US2694087A successfully refreshed from Google Patents.
US2694087A
Expired / Lapsed
US
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Hydroxy aralkylene ethers of aryl sulfonic acids
Assignee: Dow Chemical Co
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Filing: 1951-10-26
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Granted: 1954-11-09
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Expires: 1971-10-26
Abstract
No abstract record available.
Inventors
- 👤 Peter S Petrie
- 👤 Edgar C Britton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:19
CPC Classifications
C; C07; C07C; C07C309/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
NEW COMPOUNDS CORRESPONDING TO THE FOLLOWING GERNERAL FORMULA
Claim 2
Dependent Claim
8 words
NEW COMPOUNDS CORRESPONDING TO THE FOLLOWING GERNERAL FORMULA
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) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |