Patent US2888489A successfully refreshed from Google Patents.
US2888489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyglycol ether surface-active agents
Assignee: Dow Chemical Co
•
Filing: 1957-01-24
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Granted: 1959-05-26
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Expires: 1977-01-24
Abstract
No abstract record available.
Inventors
- 👤 Lee H Horsley
- 👤 Edgar C Britton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:12
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/178; C07C43/1785; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
6 words
A COMPOUND CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
6 words
A COMPOUND CORRESPONDING TO THE FORMULA
Claim 3
Dependent Claim
13 words
A COMPOUND AS DEFINED IN CLAIM 1 WHEREIN R IS A PHENYL RADICAL.
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) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |