US3418979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instantaneous water heater heated by a vaporised oil burner
Assignee: Vaillant GmbH
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Filing: 1967-09-06
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Granted: 1968-12-31
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Expires: 1987-09-06
Abstract
No abstract record available.
Inventors
- 👤 Reichmann Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:27
CPC Classifications
F; F23; F23C; F23C99/00; F24; F24H; F24H1/00; F24H1/10; F24H1/12; F24H1/14; F24H1/145; F24H9/00; F24H9/18; F24H9/1809; F24H9/1832; F24H9/1836; F23C2700/00; F23C2700/02; F23C2700/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |