Patent US2824891A successfully refreshed from Google Patents.
US2824891A
Expired / Lapsed
US
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Surface active agents derived from aromatic aldehyde intermediates
Assignee: Universal Oil Products Co
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Filing: 1955-11-07
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Granted: 1958-02-25
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Expires: 1975-11-07
Abstract
No abstract record available.
Inventors
- 👤 Ernest L Pollitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:55
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND HAVING THE STRUCTUAL FORMULA
Claim 2
Dependent Claim
6 words
A COMPOUND HAVING THE STRUCTUAL FORMULA
References Cited (Backward Citations)
US2103880A
Cited
US2198249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |