US2541630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sludge handling system and apparatus
Assignee: Yeomans Brothers Co
•
Filing: 1946-08-19
•
Granted: 1951-02-13
•
Expires: 1966-08-19
Abstract
No abstract record available.
Inventors
- 👤 Yeomans Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:55
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/2931; Y10T137/2937; Y10T137/2947; Y10T137/2965; Y10T137/2975
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US948725A
Cited
US724051A
Cited
US1247540A
Cited
US2097454A
Cited
US2190598A
Cited
US2280930A
Cited
US2348670A
Cited
US2383834A
Cited
US2481894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |