US3368535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor generator construction
Assignee: Combustion Engineering Inc
•
Filing: 1965-12-20
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Granted: 1968-02-13
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Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 Konrad S Svendsen
- 👤 Willburt W Schroedter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:39
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/62; F22B37/64; F22B37/66; F22B37/02; F22B37/10; F22B37/20; F22B37/208
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) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |