US2422490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rooter
Assignee: Keppel LeTourneau USA Inc
•
Filing: 1945-08-20
•
Granted: 1947-06-17
•
Expires: 1965-08-20
Abstract
No abstract record available.
Inventors
- 👤 Tourneau Robert G Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:42
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/06; Y; Y10; Y10S; Y10S37/00; Y10S37/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1644110A
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US1731984A
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US1840002A
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US2228445A
Cited
US2270840A
Cited
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US2302614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |