US2513569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cupola
Assignee: Whiting Corp
•
Filing: 1947-01-04
•
Granted: 1950-07-04
•
Expires: 1967-01-04
Abstract
No abstract record available.
Inventors
- 👤 Hugo L Kuehlthau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:37
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1044; Y10T292/1045; Y10T292/1075; Y10T292/1082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US45030A
Cited
US1286632A
Cited
US1448480A
Cited
US1563949A
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US1883501A
Cited
US2102823A
Cited
US2196789A
Cited
US2429285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |