Patent US3214949A successfully refreshed from Google Patents.
US3214949A
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US
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Method and apparatus for expanding hollow articles
Assignee: Olin Corp
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Filing: 1963-06-24
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Granted: 1965-11-02
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Johnson Wallace Collister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:50
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49369; Y10T29/49371
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
A METHOD OF EXPANDING A SUBSTANTIALLY FLAT BLANK HAVING INTERIOR PORTIONS JOINING OPPOSED OUTER FACES OF SAID BLANK, WHEREIN SAID INTERIOR PORTIONS ROTATE UPON EXPANSION OF SAID BLANK, THE METHOD COMPRISING (A) CONFINING SAID BLANK BETWEEN FIRST AND SECOND SURFACES, OPPOSED OUTER FACES OF SAID BLANK BEING IN CONTACT WITH SAID FIRST AND SECOND SURFACES, (B) APPLYING DISTENDING PRESSURE TO THE INTERIOR OF SAID BLANK TO FORCE APART SAID OUTER FACES THEREOF, (C) ALLOWING ONE OF SAID FIRST AND SECOND SURFACES TO MOVE IN A DIRECTION PARALLEL TO SAID BLANK AS THE INTERIOR PORTIONS THEREOF ROTATE, AND (D) ALLOWING THE OTHER OF SAID FIRST AND SECOND SURBLANK.
References Cited (Backward Citations)
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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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |