US2857370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing ester and amide type anionic surface active agents
Assignee: GAF Chemicals Corp
•
Filing: 1954-11-22
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Granted: 1958-10-21
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Expires: 1974-11-22
Abstract
No abstract record available.
Inventors
- 👤 Robert L Sundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:08
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/07; C07C309/08; C07C309/13; C07C309/14; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/16; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/04; Y10S516/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2711415A
Cited
US1932180A
Cited
US2125544A
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US2198046A
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US2209634A
Cited
US2234581A
Cited
US2216618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |