US2720201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion heater burner housing with flame arrester
Assignee: Protectoseal Co
•
Filing: 1948-10-11
•
Granted: 1955-10-11
•
Expires: 1968-10-11
Abstract
No abstract record available.
Inventors
- 👤 William A Lebus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:12
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/205; F24H1/206; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D14/10; F23D14/46; F23D14/72; F23D14/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1237858A
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US1372713A
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US1294999A
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US1641350A
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US1751533A
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US1869897A
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US1853277A
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US1841465A
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US1935705A
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US2186752A
Cited
US2531139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |