Patent US2930778A successfully refreshed from Google Patents.
US2930778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of surface-active compounds
Assignee: Rohm and Haas Co
•
Filing: 1956-03-27
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Granted: 1960-03-29
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Expires: 1976-03-27
Abstract
No abstract record available.
Inventors
- 👤 Fred E Boettner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:51
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/008; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A METHOD FOR THE PREPARATION OF COMPOUNDS HAVING THE FORMULA
Claim 2
Independent Claim
10 words
A METHOD FOR THE PREPARATION OF COMPOUNDS HAVING THE FORMULA
References Cited (Backward Citations)
GB594475A
Cited
US2498656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |