US3534815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor generator having tube coils at different elevations and pressure reducing means for reducing pressure independently of the rate of flow
Assignee: Sulzer AG
•
Filing: 1967-12-08
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Granted: 1970-10-20
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Expires: 1987-12-08
Abstract
No abstract record available.
Inventors
- 👤 Jakob Kagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:06
CPC Classifications
G; G21; G21C; G21C1/00; G21C1/32; G21C1/324; F; F22; F22B; F22B37/00; F22B37/62; F22B37/70; F22B37/72; F22B37/74; G21C15/00; G21C15/02; G21C19/00; G21C19/02; G21C19/04; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/8593; Y10T137/87265; Y10T137/877; Y10T137/87829; Y10T137/87877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |