US2538701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine plant heat exchanger cleaning apparatus
Assignee: BBC Brown Boveri AG Germany
•
Filing: 1946-06-03
•
Granted: 1951-01-16
•
Expires: 1966-06-03
Abstract
No abstract record available.
Inventors
- 👤 Meyer Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:12
CPC Classifications
F; F28; F28G; F28G9/00; F02; F02C; F02C7/00; F02C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2028250A
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US1764189A
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US2109855A
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CH212269A
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US2200668A
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US2302513A
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US2403388A
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US2418911A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |