Patent US2418200A successfully refreshed from Google Patents.
US2418200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral working apparatus
Assignee: Linde Air Products Co
•
Filing: 1942-06-13
•
Granted: 1947-04-01
•
Expires: 1962-06-13
Abstract
No abstract record available.
Inventors
- 👤 George H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/14; F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K15/065; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/7922; Y10T137/7924
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1303123A
Cited
US968350A
Cited
US1228038A
Cited
US1178551A
Cited
US2003167A
Cited
US1930107A
Cited
US2327482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-31 | 1950-09-30 | 1951-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-31 | 1954-09-30 | 1955-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-31 | 1958-09-30 | 1959-04-01 | $7700.00 | Window Closed / Lapsed |