US3398261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode-type steam bath steam generator
Assignee: DURWARD W MAYS
•
Filing: 1967-03-03
•
Granted: 1968-08-20
•
Expires: 1987-03-03
Abstract
No abstract record available.
Inventors
- 👤 Durward W Mays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:43
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/28; F22B1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1424340A
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US1665793A
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FR784163A
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GB472479A
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CH245010A
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GB629894A
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US2542439A
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US2790890A
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US2821614A
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US2783355A
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US3083288A
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US3104308A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |