Patent US3203824A successfully refreshed from Google Patents.
US3203824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cladding metal tubes
Assignee: Individual
•
Filing: 1962-02-01
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Granted: 1965-08-31
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Expires: 1982-02-01
Abstract
No abstract record available.
Inventors
- 👤 Harry W Mcquaid
- 👤 William L Ulmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:41
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/34; C23C2/36; C23C2/38; C23C2/385
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF CLADDING A FIRST METAL IN THE FORM OF AN ELONGATED BAR-LIKE MEMBER WITH A CONTINUOUS, NON-POOROUS COATING OF A SECOND METAL COMPRISED OF THE FOLLOWING STEPS: CLEANING SAID MEMBER, HEATING SAID MEMBER TO A TEMPERATURE BEYOND THE MELTING POINT OF THE SECOND METAL BUT BELOW THE MELTING POINT OF THE FIRST METAL, SIMULTANEOUSLY SUBJECTING SAID MEMBER TO AN ATMOSPHERE OF GASEOOUS BORON BASE FLUX, PROVIDING A MOLTEN BATH OF SAID SECOND METAL, FILLING THE SPACE ABOVE SAID BATH WITH GASEOUS BORON BASE FLUX TO EXCLUDE ALL CORROSIVE GASES AND PASSING SAID MEMBER INTO SAID BATH WHILE ALL HEATED SURFACE AREA OF SAID MEMBER IS IN CONTINUOUS CONTACT WITH SAID GASEOUS BORON BASE FLUX UNTIL SAID AREA IS DIPPED INTO SAID BATH.
Claim 2
Independent Claim
124 words
A METHOD OF CLADDING A FIRST METAL IN THE FORM OF AN ELONGATED BAR-LIKE MEMBER WITH A CONTINUOUS, NON-POOROUS COATING OF A SECOND METAL COMPRISED OF THE FOLLOWING STEPS: CLEANING SAID MEMBER, HEATING SAID MEMBER TO A TEMPERATURE BEYOND THE MELTING POINT OF THE SECOND METAL BUT BELOW THE MELTING POINT OF THE FIRST METAL, SIMULTANEOUSLY SUBJECTING SAID MEMBER TO AN ATMOSPHERE OF GASEOOUS BORON BASE FLUX, PROVIDING A MOLTEN BATH OF SAID SECOND METAL, FILLING THE SPACE ABOVE SAID BATH WITH GASEOUS BORON BASE FLUX TO EXCLUDE ALL CORROSIVE GASES AND PASSING SAID MEMBER INTO SAID BATH WHILE ALL HEATED SURFACE AREA OF SAID MEMBER IS IN CONTINUOUS CONTACT WITH SAID GASEOUS BORON BASE FLUX UNTIL SAID AREA IS DIPPED INTO SAID BATH.
References Cited (Backward Citations)
US2323666A
Cited
US2405592A
Cited
US2701546A
Cited
US2771056A
Cited
US2762115A
Cited
US2950991A
Cited
US3010844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |