Patent US3404875A successfully refreshed from Google Patents.
US3404875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for burning insulation
Assignee: Individual
•
Filing: 1965-10-14
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Granted: 1968-10-08
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Expires: 1985-10-14
Abstract
No abstract record available.
Inventors
- 👤 Hall Isaiah Lees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:00
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/005; C22B13/00; C22B13/02; C22B13/025; C22B15/00; C22B15/0002; C22B15/0004; C22B15/0006; C23; C23G; C23G5/00; F; F23; F23G; F23G5/00; F23G5/08; F23G5/14; F23G7/00; F23G7/12; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2051463A
Cited
US2729301A
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US2832585A
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US2995354A
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US2964304A
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US3129932A
Cited
US3190747A
Cited
US3271134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |