Patent US3221533A successfully refreshed from Google Patents.
US3221533A
Expired / Lapsed
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Methods of manufacturing threaded closures
Assignee: Inland Steel Co
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Filing: 1965-03-17
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Granted: 1965-12-07
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Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 Buys Adriaan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:28
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/44; B21D51/50; B65; B65D; B65D39/00; B65D39/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/4992
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD OF FORMING A CLOSURE SEAT FOR CONTAINERS HAVING A SHEET METAL WALL, COMPRISING, THE STEPS OF FORMING A PLURALITY OF SLOTS IN SAID WALL EXTENDING RADIALLY FROM A COMMON POINT WITH SAID SLOTS DEFINING A PLURALITY OF TONGUES, FORMING PORTIONS OF SCREW THREADS IN SAID TONGUES, AND BENDING SAID TONGUES OUT OF THE PLANE OF SAID WALL.
Claim 2
Independent Claim
59 words
A METHOD OF FORMING A CLOSURE SEAT FOR CONTAINERS HAVING A SHEET METAL WALL, COMPRISING, THE STEPS OF FORMING A PLURALITY OF SLOTS IN SAID WALL EXTENDING RADIALLY FROM A COMMON POINT WITH SAID SLOTS DEFINING A PLURALITY OF TONGUES, FORMING PORTIONS OF SCREW THREADS IN SAID TONGUES, AND BENDING SAID TONGUES OUT OF THE PLANE OF SAID WALL.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |