Patent US3155158A successfully refreshed from Google Patents.
US3155158A
Expired / Lapsed
US
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Header type tubular heat exchanger
Assignee: English Electric Co Ltd
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Filing: 1961-02-27
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Granted: 1964-11-03
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Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Peters Walter Ernest
- 👤 Mills Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:55
CPC Classifications
F; F22; F22D; F22D1/00; F22D1/32; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/405; Y10S165/407; Y10S165/409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1768786A
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US1808619A
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US1883605A
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US1929376A
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GB537168A
Cited
US2263397A
Cited
US2467741A
Cited
US2729433A
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US2756028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |