US2742057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for ventilating engine crankcase
Assignee: Individual
•
Filing: 1952-10-22
•
Granted: 1956-04-17
•
Expires: 1972-10-22
Abstract
No abstract record available.
Inventors
- 👤 James H Krieck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:33
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; Y; Y10; Y10S; Y10S55/00; Y10S55/19; Y10S55/30; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7837; Y10T137/7847; Y10T137/7848
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1049992A
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US1100761A
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US1242003A
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US1498399A
Cited
US1529384A
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US1990657A
Cited
GB437161A
Cited
US2093035A
Cited
US2359485A
Cited
US2367662A
Cited
US2450864A
Cited
US2550373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |