US2419658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demonstrating device
Assignee: Gulf Oil Corp
•
Filing: 1945-05-08
•
Granted: 1947-04-29
•
Expires: 1965-05-08
Abstract
No abstract record available.
Inventors
- 👤 Hiram M Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:44
CPC Classifications
G; G09; G09B; G09B25/00; G09B25/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE309388C
Cited
US1021229A
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US1124543A
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US1266149A
Cited
US1603028A
Cited
US1670002A
Cited
US1866105A
Cited
US1921692A
Cited
US2110237A
Cited
US2048966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |