US2615616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine and compressor apparatus
Assignee: Individual
•
Filing: 1950-04-08
•
Granted: 1952-10-28
•
Expires: 1970-04-08
Abstract
No abstract record available.
Inventors
- 👤 Bowen William Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:06
CPC Classifications
F; F01; F01D; F01D1/00; F01D1/02; F01D1/06; F01D1/08; F04; F04D; F04D17/00; F04D17/02; Y; Y10; Y10S; Y10S415/00; Y10S415/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US487883A
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US1485695A
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US1037440A
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US1697279A
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US2028603A
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DE671418C
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US2139112A
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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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |