Patent US3249687A successfully refreshed from Google Patents.
Patent US2604296A successfully refreshed from Google Patents.
US2604296A
Expired / Lapsed
US
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Ring valve for compressors
Assignee: Hoerbiger and Co
•
Filing: 1948-07-02
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Granted: 1952-07-22
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Expires: 1968-07-02
Abstract
No abstract record available.
Inventors
- 👤 Kehler Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:58
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/08; F16K15/10; F16K15/025; F16K15/026; F16K15/028; F16K2200/00; F16K2200/20; F16K2200/203; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/786; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/7904; Y10T137/7922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US810216A
Cited
US1416637A
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US1695069A
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US1833841A
Cited
DE664890C
Cited
AT149264B
Cited
AT151862B
Cited
GB543006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |