US2624756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal ion chelating compounds consisting of mono phenyl poly alkylene polyamino polycarboxylic acids and salts
Assignee: Individual
•
Filing: 1950-11-01
•
Granted: 1953-01-06
•
Expires: 1970-11-01
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:47
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/12; Y; Y10; Y10S; Y10S424/00; Y10S424/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND CONFORMING TO THE FORMULA:
Claim 2
Dependent Claim
6 words
A COMPOUND CONFORMING TO THE 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) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |