US3412019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of flocculating suspended particulate matter from an aqueous medium
Assignee: Calgon Corp
•
Filing: 1965-05-25
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Granted: 1968-11-19
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Expires: 1985-05-25
Abstract
No abstract record available.
Inventors
- 👤 Hoover Merwin Frederick
- 👤 Raymond J Schaper
- 👤 Jerry E Boothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:03
CPC Classifications
C; C07; C07C; C07C255/00; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08F; C08F26/00; C08F26/02; C08F26/04; Y; Y10; Y10S; Y10S526/00; Y10S526/923
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) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |