US2786647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam turbines
Assignee: Individual
•
Filing: 1951-08-23
•
Granted: 1957-03-26
•
Expires: 1971-08-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick B Romero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:23
CPC Classifications
F; F01; F01D; F01D1/00; F01D1/02; F01D1/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US849699A
Cited
US901385A
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US890918A
Cited
US1021562A
Cited
US1075528A
Cited
US1235201A
Cited
US1778331A
Cited
US1975705A
Cited
US2084667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |