US3024221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfo esters of alpha-methylene carboxylic acids
Assignee: Dow Chemical Co
•
Filing: 1957-03-25
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Granted: 1962-03-06
•
Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Fevre Walter J Le
- 👤 David P Sheetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:49
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/07; C07C309/12; C08; C08F; C08F28/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
COMPOSITION OF MATTER HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
COMPOSITION OF MATTER HAVING THE 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) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |