US2978477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitro keto alkyl esters of aromatic sulfonic acids
Assignee: Aerojet Rocketdyne Inc
•
Filing: 1953-12-08
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Granted: 1961-04-04
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Expires: 1973-12-08
Abstract
No abstract record available.
Inventors
- 👤 Gustave B Linden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:10
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/63; C07C309/72; C07C309/73; C06; C06B; C06B25/00; C06B25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
AS COMPOSITIONS OF MATTER OF ALKYL KETO SULFONIC ESTER HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
13 words
AS COMPOSITIONS OF MATTER OF ALKYL KETO SULFONIC ESTER HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2395386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |