Patent DE7541552U successfully refreshed from Google Patents.
US2480658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravity-fed gas burner
Assignee: LAWSON Manufacturing Co
•
Filing: 1944-02-17
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Granted: 1949-08-30
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Expires: 1964-02-17
Abstract
No abstract record available.
Inventors
- 👤 Chester D Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D14/08; F23D14/085; F23D14/46; F23D14/48; F23D14/58; F23D14/583; F23D14/586
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |