Patent US2785174A successfully refreshed from Google Patents.
US2785174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene diamine tetra acetic acid salts of alkyl imidazolines
Assignee: Individual
•
Filing: 1953-04-07
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Granted: 1957-03-12
•
Expires: 1973-04-07
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Hans
- 👤 Meyer Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:48
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/06; Y; Y10; Y10S; Y10S424/00; Y10S424/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
AN ETHYLENE DIAMINE TETRA ACETIC ACID SALT OF AN ALKYL IMIDAZOLINE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
15 words
AN ETHYLENE DIAMINE TETRA ACETIC ACID SALT OF AN ALKYL IMIDAZOLINE OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2155877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |