US2876947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple drive gear and pinion geared, multiple pressure stage compounded, elastic fluid compressor, applicable to a combustion turbine
Assignee: Individual
•
Filing: 1956-11-01
•
Granted: 1959-03-10
•
Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 Butler Frank David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:22
CPC Classifications
F; F04; F04B; F04B49/00; F01; F01C; F01C11/00; F01C11/002; F01C11/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1443764A
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US1626768A
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FR660528A
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US2667744A
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US2776086A
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US2746248A
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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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |