US3520634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust steam housing for low pressure steam turbines
Assignee: BBC Brown Boveri AG Germany
•
Filing: 1969-01-14
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Granted: 1970-07-14
•
Expires: 1989-01-14
Abstract
No abstract record available.
Inventors
- 👤 Hans Bellati
- 👤 Pierre Meylan
- 👤 Willi Rutti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:16
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/24; F01D25/26; F01D25/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1682317A
Cited
US1061672A
Cited
GB625377A
Cited
GB780392A
Cited
DE1028583B
Cited
US2904962A
Cited
GB913375A
Cited
US3313517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |