US3331773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for inhibiting precipitation in water
Assignee: WR Grace and Co
•
Filing: 1966-07-22
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Granted: 1967-07-18
•
Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 Lewis O Gunderson
- 👤 Kerst Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12; C08F8/28; C08F8/30; C08F8/32; C08F8/44; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD FOR TREATING WATER FOR THE INHIBITION OF PRECIPITATION OF ALKALI EARTH METAL SALTS WHICH COMPRISES DISPERSING INTO SAID WATER IN AN AMOUNT SUBSTANTIALLY LESS THAN REQUIRED STOICHIOMETRICALLY TO REACT COMPLETELY WITH ALKALI EARTH METAL SALTS BUT SUFFICIENT TO PREVENT SCALE FORMATION, A WATER DISPERSIBLE COMPLEXING POLYMER HAVING THE FORMULA:
Claim 2
Independent Claim
51 words
A METHOD FOR TREATING WATER FOR THE INHIBITION OF PRECIPITATION OF ALKALI EARTH METAL SALTS WHICH COMPRISES DISPERSING INTO SAID WATER IN AN AMOUNT SUBSTANTIALLY LESS THAN REQUIRED STOICHIOMETRICALLY TO REACT COMPLETELY WITH ALKALI EARTH METAL SALTS BUT SUFFICIENT TO PREVENT SCALE FORMATION, A WATER DISPERSIBLE COMPLEXING POLYMER HAVING 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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |