US3157594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of flocculation
Assignee: Pennwalt Corp
•
Filing: 1963-09-06
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Granted: 1964-11-17
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Expires: 1983-09-06
Abstract
No abstract record available.
Inventors
- 👤 Ashley D Nevers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:34
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
IN THE PROCESS OF TREATING TURBID WATER, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID WATER A FLOCCULATING AMOUNT OF A GELATINIZED STARCH DERIVATIVE OBTAINED BY REACTING 1 TO 10 PARTS BY WEIGHT OF STARCH WITH 1 PART BY WEIGHT OF A METHYLOL TRIAZONE OF STRUCTURE
Claim 2
Dependent Claim
45 words
IN THE PROCESS OF TREATING TURBID WATER, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID WATER A FLOCCULATING AMOUNT OF A GELATINIZED STARCH DERIVATIVE OBTAINED BY REACTING 1 TO 10 PARTS BY WEIGHT OF STARCH WITH 1 PART BY WEIGHT OF A METHYLOL TRIAZONE OF STRUCTURE
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |