Patent US3067385A successfully refreshed from Google Patents.
US640378A
Expired / Lapsed
US
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Oil-burner.
Assignee: JAMES A KENWORTHY
•
Filing: 1899-04-19
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Granted: 1900-01-02
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Expires: 1919-04-19
Abstract
No abstract record available.
Inventors
- 👤 Charles A Hammel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:48
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/10
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) | 1903-01-02 | 1903-07-04 | 1904-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-01-02 | 1907-07-04 | 1908-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-01-02 | 1911-07-04 | 1912-01-03 | $7700.00 | Window Closed / Lapsed |