US3383042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-heated continuous-flow heater for hot-water circulation heating
Assignee: Vaillant GmbH
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Filing: 1966-01-12
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Granted: 1968-05-14
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Expires: 1986-01-12
Abstract
No abstract record available.
Inventors
- 👤 Mobus Gunther
- 👤 Meier Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:15
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/08; F23N1/087; F23N1/085; F23N5/00; F23N5/02; F23N5/10; F23N5/107; F24; F24D; F24D19/00; F24D19/10; F24D19/1006; F24D3/00; F24D3/02; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2035; F23N2235/00; F23N2235/12; F23N2235/14; F23N2235/18; F23N2241/00; F23N2241/04; F23N5/24
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |