US2613178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electroforming seamless tubes
Assignee: Uniroyal Inc
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Filing: 1946-01-19
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Granted: 1952-10-07
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Expires: 1966-01-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:52
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/30; C; C25; C25D; C25D1/00; C25D1/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
THE METHOD OF MAKING UPON THE SAME FORM SUCCESSIVE TUBULAR OBJECT OF IRON HAVING A SMOOTH ACCURATELY SIZED INNER SURFACE, WHICH COMPRISES PROVIDING A STEEL FORM HAVING A SMOOTH ACCURATELY FORMED OUTER SURFACE, ELECTRODEPOSITING A THIN BARRIER IN THE FORM OF A FLASH FILM OF COPPER OVER THE FORM, ELECTRODEPOSITING A FILM OF LEAD APPROXIMATELY .001 INCH THICK OVER THE COPPER, ELECTRODEPOSITING A SECOND FLASH FILM OF COPPER OF SIMILAR THICKNESS OF THE FIRST AS A BARRIER OVER THE LEAD ELECTRODEPOSITING A SEAMLESS IRONJACKET OF SUBSTANTIAL THICKNESS OVER SAID SECOND FLASH FILM SO THAT THE BORE OF THIS JACKET WILL CONFORM WITHIN APPROXIMATELY .001 OF AN INCH TO THE SIZE OF THE CORRESPONDING PORTION OF SAID FROM, AND THEN MELTING THE LEAD FILM AND DRAWING THE IRON JACKET OFF THE FORM WHILE THE LEAD IS PREVENTED BY THE BARRIERS FROM CONTACTING THE METAL OF THE FORM OR JACKET.
Claim 2
Independent Claim
148 words
THE METHOD OF MAKING UPON THE SAME FORM SUCCESSIVE TUBULAR OBJECT OF IRON HAVING A SMOOTH ACCURATELY SIZED INNER SURFACE, WHICH COMPRISES PROVIDING A STEEL FORM HAVING A SMOOTH ACCURATELY FORMED OUTER SURFACE, ELECTRODEPOSITING A THIN BARRIER IN THE FORM OF A FLASH FILM OF COPPER OVER THE FORM, ELECTRODEPOSITING A FILM OF LEAD APPROXIMATELY .001 INCH THICK OVER THE COPPER, ELECTRODEPOSITING A SECOND FLASH FILM OF COPPER OF SIMILAR THICKNESS OF THE FIRST AS A BARRIER OVER THE LEAD ELECTRODEPOSITING A SEAMLESS IRONJACKET OF SUBSTANTIAL THICKNESS OVER SAID SECOND FLASH FILM SO THAT THE BORE OF THIS JACKET WILL CONFORM WITHIN APPROXIMATELY .001 OF AN INCH TO THE SIZE OF THE CORRESPONDING PORTION OF SAID FROM, AND THEN MELTING THE LEAD FILM AND DRAWING THE IRON JACKET OFF THE FORM WHILE THE LEAD IS PREVENTED BY THE BARRIERS FROM CONTACTING THE METAL OF THE FORM OR JACKET.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |