US3488720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing polyacrylamide-based flocculant and flocculations therewith
Assignee: Wyeth Holdings LLC
•
Filing: 1967-04-06
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Granted: 1970-01-06
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Expires: 1987-04-06
Abstract
No abstract record available.
Inventors
- 👤 Daniel Elmer Nagy
- 👤 Laurence Lyman Williams
- 👤 Anthony Thomas Coscia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:49
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08K; C08K5/00; C08K5/16; C08K5/17; Y; Y10; Y10S; Y10S210/00; Y10S210/928
Claims Analysis
Total Claims: 0
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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) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |