Patent US2508987A successfully refreshed from Google Patents.
US2508987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slurry feeding apparatus
Assignee: Wallace & Tiernan Co Inc
•
Filing: 1946-12-26
•
Granted: 1950-05-23
•
Expires: 1966-12-26
Abstract
No abstract record available.
Inventors
- 👤 George M Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:31
CPC Classifications
B; B01; B01J; B01J4/00; B01J4/001; C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/687; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86292; Y10T137/863; Y10T137/86308
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1506089A
Cited
US1531922A
Cited
US1704026A
Cited
US1780853A
Cited
US2124983A
Cited
US2152455A
Cited
US2446750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |