US3549527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of clarifying aqueous suspensions
Assignee: ChampionX LLC
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Filing: 1969-11-14
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Granted: 1970-12-22
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Expires: 1989-11-14
Abstract
No abstract record available.
Inventors
- 👤 David F Peck
- 👤 Thomas J Mcbride
- 👤 Elmer W Palmer
- 👤 Douglas A Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:19
CPC Classifications
B; B03; B03C; B03C1/00; C; C02; C02F; C02F1/00; C02F1/48; C02F1/488; C02F1/52; C02F1/54
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |