US2029216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crank case ventilation
Assignee: Individual
•
Filing: 1934-11-15
•
Granted: 1936-01-28
•
Expires: 1954-11-15
Abstract
No abstract record available.
Inventors
- 👤 George A Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:22
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/04; F01M13/021; F01M2013/0411; F02; F02B; F02B2275/00; F02B2275/22; Y; Y10; Y10S; Y10S55/00; Y10S55/19
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) | 1939-01-27 | 1939-07-29 | 1940-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-27 | 1943-07-29 | 1944-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-27 | 1947-07-29 | 1948-01-28 | $7700.00 | Window Closed / Lapsed |