Patent US2394861A successfully refreshed from Google Patents.
US2394861A
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Assignee: Keppel LeTourneau USA Inc
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Filing: 1943-08-11
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Granted: 1946-02-12
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Expires: 1963-08-11
Abstract
No abstract record available.
Inventors
- 👤 Tourneau Robert G Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:23
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/1261; B23B31/1284; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17213; Y10T279/17411; Y10T279/17461; Y10T279/17761; Y10T279/17786; Y10T279/18; Y10T279/24; Y10T279/247; Y10T82/00; Y10T82/26; Y10T82/262; Y10T82/264
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) | 1949-02-11 | 1949-08-13 | 1950-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-02-11 | 1953-08-13 | 1954-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-02-11 | 1957-08-13 | 1958-02-12 | $7700.00 | Window Closed / Lapsed |