US3397953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flocculating agent
Assignee: Zeneca Inc
•
Filing: 1965-03-04
•
Granted: 1968-08-20
•
Expires: 1985-03-04
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Galvin
- 👤 Francis A Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:09
CPC Classifications
C; C08; C08L; C08L3/00; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/06; C01F7/0646; C01F7/0653; C01G; C01G49/00; C01G49/02; C02; C02F; C02F1/00; C02F1/52; C02F1/5263; C02F1/54; C08L33/00; C08L33/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |