Patent US1507434A successfully refreshed from Google Patents.
Patent US3069175A successfully refreshed from Google Patents.
US3069175A
Expired / Lapsed
US
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Seal
Assignee: Individual
•
Filing: 1959-08-17
•
Granted: 1962-12-18
•
Expires: 1979-08-17
Abstract
No abstract record available.
Inventors
- 👤 Sr Ralph L Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:29
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1370346A
Cited
US1421802A
Cited
US1561378A
Cited
US1674762A
Cited
US2084822A
Cited
US2186537A
Cited
US2639928A
Cited
US2651534A
Cited
US2742306A
Cited
US2859055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |