Patent US3395677A successfully refreshed from Google Patents.
US3395677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube lining for prismatic combustion chambers
Assignee: Sulzer AG
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Filing: 1967-02-01
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Granted: 1968-08-06
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Expires: 1987-02-01
Abstract
No abstract record available.
Inventors
- 👤 Brandstetter Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:46
CPC Classifications
F; F23; F23M; F23M5/00; F23M5/08; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/14; F22B37/146
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) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |