Patent US3404732A successfully refreshed from Google Patents.
US3404732A
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Excavator cooling system
Assignee: NORTHWEST ENGINEERING Co A CORP OF
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Filing: 1967-01-20
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Granted: 1968-10-08
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Expires: 1987-01-20
Abstract
No abstract record available.
Inventors
- 👤 George W Mork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:57
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18; E; E02; E02F; E02F9/00; E02F9/08; E02F9/0858; E02F9/0866; F; F15; F15B; F15B21/00; F15B21/04; F15B21/042; F15B21/0423; B66C2700/00; B66C2700/06; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |