Patent US4332322A successfully refreshed from Google Patents.
Patent US2797296A successfully refreshed from Google Patents.
US2797296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater
Assignee: Individual
•
Filing: 1955-07-25
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Granted: 1957-06-25
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Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 Paul L Fowler
- 👤 Chester A Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:13
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; H05B3/20; H05B3/34; H05B3/342; H05B3/347; H05B3/565; H05B2203/00; H05B2203/002; H05B2203/003; H05B2203/011; H05B2203/014; H05B2203/015; H05B2203/017; H05B2203/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1321462A
Cited
US1704413A
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US1642197A
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US1992593A
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US2022662A
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US2157606A
Cited
US2284653A
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US2375997A
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US2572695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |