Patent US2765284A successfully refreshed from Google Patents.
US2765284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chelating agents
Assignee: Dow Chemical Co
•
Filing: 1954-04-20
•
Granted: 1956-10-02
•
Expires: 1974-04-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:50
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
THE COMPOSITION FORMED BY POLYMERIZING A CHELATING COMPOUND CONFORMING TO THE FOLLOWING GENERIC FORMULA:
Claim 2
Dependent Claim
14 words
THE COMPOSITION FORMED BY POLYMERIZING A CHELATING COMPOUND CONFORMING TO THE FOLLOWING GENERIC FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |