Patent US3050833A successfully refreshed from Google Patents.
US3050833A
Expired / Lapsed
US
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Method of making electrically insulated heating units
Assignee: THERMAL Manufacturing Co
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Filing: 1958-05-19
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Granted: 1962-08-28
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Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 Russell L Schwing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:01
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/46; H05B3/10; H05B3/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49089
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US607311A
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US1530928A
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US1754003A
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US1870425A
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US2130715A
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US2284862A
Cited
US2363130A
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US2670529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |