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US2907791A
Expired / Lapsed
US
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Amphoteric surface-active organic compounds
Assignee: Evonik Operations GmbH
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Filing: 1955-05-16
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Granted: 1959-10-06
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Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Schmitz Adolf
- 👤 Cramer Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:18
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/38; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AMPHOTERIC SURFACE-ACTIVE ORGANIC COMPOUNDS HAVINGING THE GENERAL FORMULA
Claim 2
Dependent Claim
8 words
AMPHOTERIC SURFACE-ACTIVE ORGANIC COMPOUNDS HAVINGING THE GENERAL 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) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |