US2678730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flocculation and sedimentation
Assignee: Dorr Co
•
Filing: 1951-02-02
•
Granted: 1954-05-18
•
Expires: 1971-02-02
Abstract
No abstract record available.
Inventors
- 👤 Harold B Coulter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:43
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; B; B01; B01D; B01D21/00; B01D21/0039; B01D21/0042; B01D21/02; B01D21/04; B01D21/06; B01D21/08; B01D21/18; B01D21/186; B01D21/24; B01D21/2405; B01D21/2427; B01D21/2433; B01D21/2438
Claims Analysis
Total Claims: 0
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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) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |