US3555656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of explosively plugging a leaky metal tube in a heat exchanger tube bundle
Assignee: Westinghouse Electric Corp
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Filing: 1967-05-25
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Granted: 1971-01-19
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Expires: 1987-05-25
Abstract
Abstract THIS INVENTION PROVIDES AN EXPLOSIVE PLUGGING DEVICE FOR INSERTION INTO A LEAKY METAL TUBE OF A HEAT EXCHANGER BUNDLE TO PLUG THE TUBE BY EXPLOSIVE WELDING AND A METHOD OF EXPLOSIVELY WELDING A METALLIC PLUGGING DEVICE HAVING AN EXPLOSIVE CHARGE TO A METAL TUBE BY DETONATING THE CHARGE WITH A DETONATION INITIATOR TO PERIPHERALLY EXPAND THE PLUG INTO WELDING ASSOCIATION WITH THE TUBE.
Inventors
- 👤 Francis X Brown
- 👤 Samuel W Wismer Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:03
CPC Classifications
F; F28; F28F; F28F11/00; F28F11/02; B; B21; B21D; B21D39/00; B21D39/06; B21D39/066; B23; B23K; B23K20/00; B23K20/06; B23K20/08; B23K20/085; F28F2275/00; F28F2275/06; F28F2275/068; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49352; Y10T29/49718; Y10T29/49732; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |