Patent US2628852A successfully refreshed from Google Patents.
US2628852A
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Cooling system for double seals
Assignee: Crane Packing Co
•
Filing: 1949-02-02
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Granted: 1953-02-17
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Expires: 1969-02-02
Abstract
No abstract record available.
Inventors
- 👤 Charles F Voytech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:49
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; F16J15/3404; Y; Y10; Y10S; Y10S277/00; Y10S277/93; Y10S285/00; Y10S285/918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1421221A
Cited
US2494887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |