US2141133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sedimentation
Assignee: Dorr Co
•
Filing: 1936-02-25
•
Granted: 1938-12-20
•
Expires: 1956-02-25
Abstract
No abstract record available.
Inventors
- 👤 Robert C Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; B; B01; B01D; B01D21/00; B01D21/0018; B01D21/02; B01D21/04; B01D21/06; B01D21/10; B01D21/12; B01D21/16; B01D21/24; B01D21/2433; B01D21/28; B01D21/286; B03; B03B; B03B5/00; B03B5/48; B03B5/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-12-19 | 1942-06-20 | 1942-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-19 | 1946-06-20 | 1946-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-19 | 1950-06-20 | 1950-12-20 | $7700.00 | Window Closed / Lapsed |