US3170227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating clad tubes
Assignee: NL Industries Inc
•
Filing: 1961-02-03
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Granted: 1965-02-23
•
Expires: 1981-02-03
Abstract
No abstract record available.
Inventors
- 👤 William W Richmond
- 👤 Mantius Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:03
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49391
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF FABRICATING HEATING TUBES USEFUL FOR ACID CONCENTRATORS WHICH COMPRISES FIRST FORMING A CLOSED HOLLOW MILD STEEL ELONGATE TUBULAR MEMBER, FORMING AN INLET AND AN OUTLET IN SAID MEMBER AT ONE END THEREOF, APPLYING BRAZING COMPOUND UPON A PORTION OF THE OUTER SURFACE OF SAID MEMBER INCLUDING ONE OUTER END SURFACE THEREOF REMOTE FROM SAID INLET AND SAID OUTLET, INSERTING THE COATED END OF THE MEMBER INTO A THIN-WALLED TANTALUM
Claim 2
Independent Claim
72 words
THE METHOD OF FABRICATING HEATING TUBES USEFUL FOR ACID CONCENTRATORS WHICH COMPRISES FIRST FORMING A CLOSED HOLLOW MILD STEEL ELONGATE TUBULAR MEMBER, FORMING AN INLET AND AN OUTLET IN SAID MEMBER AT ONE END THEREOF, APPLYING BRAZING COMPOUND UPON A PORTION OF THE OUTER SURFACE OF SAID MEMBER INCLUDING ONE OUTER END SURFACE THEREOF REMOTE FROM SAID INLET AND SAID OUTLET, INSERTING THE COATED END OF THE MEMBER INTO A THIN-WALLED TANTALUM
References Cited (Backward Citations)
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Cited
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Cited
US1511056A
Cited
US1690684A
Cited
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Cited
US2713196A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |