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US2550643A
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Steam trap
Assignee: Clarcor Inc
•
Filing: 1948-10-01
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Granted: 1951-04-24
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Expires: 1968-10-01
Abstract
No abstract record available.
Inventors
- 👤 John L Mainwaring
- 👤 Harold E Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:23
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/20; F16T1/30; F16T1/305; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304; Y10T137/3046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1060999A
Cited
US1960999A
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US1901200A
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US2005926A
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US2060300A
Cited
US2190138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |