US3336221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting precipitation and scale formation
Assignee: Calgon Corp
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Filing: 1964-11-05
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Granted: 1967-08-15
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Expires: 1984-11-05
Abstract
No abstract record available.
Inventors
- 👤 Paul H Ralston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/36; C11D3/364; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; Y; Y10; Y10S; Y10S507/00; Y10S507/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A METHOD OF INHIBITING THE PRECIPITATION OF SCALEFORMING SALTS IN AN AQUEOUS SYSTEM COMPRISING ADDING TO SAID SYSTEM A COMPOUND OF THE GENERAL FORMULA
Claim 2
Independent Claim
24 words
A METHOD OF INHIBITING THE PRECIPITATION OF SCALEFORMING SALTS IN AN AQUEOUS SYSTEM COMPRISING ADDING TO SAID SYSTEM A COMPOUND OF THE GENERAL 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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |