Patent US1138735A successfully refreshed from Google Patents.
US2579004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid fuel burner with nondribble tip valve
Assignee: Shell Development Co
•
Filing: 1948-09-17
•
Granted: 1951-12-18
•
Expires: 1968-09-17
Abstract
No abstract record available.
Inventors
- 👤 Joyce John Ruskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:25
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/24; F23D11/26; F23D11/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1051908A
Cited
US1326488A
Cited
US1333612A
Cited
US1644372A
Cited
US2308909A
Cited
US2345402A
Cited
US2411181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |