US3293176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of chelating with an ethergroup-containing sequestering agent
Assignee: Individual
•
Filing: 1964-04-01
•
Granted: 1966-12-20
•
Expires: 1984-04-01
Abstract
No abstract record available.
Inventors
- 👤 Le Roy A White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C07; C07C; C07C55/00; C07C55/32; C07C59/00; C07C59/235; C07C59/305; C07C59/40; C07C59/58; C07C59/64; C07C59/66; C07C59/68; C07C65/00; C07C65/21; C07C65/24; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C11D3/26; C11D3/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
THE METHOD OF TREATING LIQUID MEDIA TO CHELATE IONS THEREFROM WHICH COMPRISES CONTACTING SAID MEDIA WITH A SEQUENTERING AGENT OF THE FORMULA:
Claim 2
Independent Claim
22 words
THE METHOD OF TREATING LIQUID MEDIA TO CHELATE IONS THEREFROM WHICH COMPRISES CONTACTING SAID MEDIA WITH A SEQUENTERING AGENT OF THE FORMULA:
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |