Patent US2543835A successfully refreshed from Google Patents.
US2543835A
Expired / Lapsed
US
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Gas-fired immersion heating apparatus
Assignee: Individual
•
Filing: 1945-12-10
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Granted: 1951-03-06
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Expires: 1965-12-10
Abstract
No abstract record available.
Inventors
- 👤 Maurice J Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:27
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/0054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172667A
Cited
US2182735A
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US2290784A
Cited
US1630309A
Cited
US2226816A
Cited
US2244800A
Cited
US2385854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |