US2474077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor with interchangeable stage elements
Assignee: Carrier Corp
•
Filing: 1945-01-15
•
Granted: 1949-06-21
•
Expires: 1965-01-15
Abstract
No abstract record available.
Inventors
- 👤 William E Trumpler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:46
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/10; F04D17/12; F04D17/122; F04D17/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US979634A
Cited
US1118070A
Cited
US1127997A
Cited
US1418704A
Cited
US2228750A
Cited
US2389753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |