US2806060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvalent metal ion chelating agent
Assignee: Dow Chemical Co
•
Filing: 1954-09-03
•
Granted: 1957-09-10
•
Expires: 1974-09-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
- 👤 Albert E Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:58
CPC Classifications
C; C11; C11D; C11D1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
COMPOUNDS CORRESPONDING TO THE FOLLOWING GENERIC FORMULA:
Claim 2
Dependent Claim
7 words
COMPOUNDS CORRESPONDING TO THE FOLLOWING GENERIC FORMULA:
References Cited (Backward Citations)
US2387735A
Cited
US2413856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |