Patent US3516932A successfully refreshed from Google Patents.
US3516932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clarification of water
Assignee: Monsanto Co
•
Filing: 1962-06-04
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Granted: 1970-06-23
•
Expires: 1982-06-04
Abstract
No abstract record available.
Inventors
- 👤 Ross M Hedrick
- 👤 David T Mowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:24
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C02F1/5236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
THE METHOD OF CLARIFYING AN AQUEOUS SUSPENSION OF SOLID INORGANIC PARTICLES WHICH IS IN FLOCCULATED CONDITION DUE TO THE PRESENCE OF INORGANIC SALTS WHICH COMPRISES ADDING TO THE SUSPENSION A POLYACRYLAMIDE.
Claim 2
Independent Claim
31 words
THE METHOD OF CLARIFYING AN AQUEOUS SUSPENSION OF SOLID INORGANIC PARTICLES WHICH IS IN FLOCCULATED CONDITION DUE TO THE PRESENCE OF INORGANIC SALTS WHICH COMPRISES ADDING TO THE SUSPENSION A POLYACRYLAMIDE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |