US3564602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing closures containing a foamed annular sealing liner and thin central portion
Assignee: Rexam Beverage Can Co
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Filing: 1963-08-29
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Granted: 1971-02-16
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Expires: 1983-08-29
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF "BOTTLE CAPS" OR CROWN CLOSURES WITH A LINER HAVING A VERY THIN TRANSPARENT CENTRAL PORTION AND A FOAMED ANNULAR RING. THE FOAMABLE VINYL PLASTISOL IS DEPOSITED IN THE INTERIOR OF THE INVERTED CLOSURE. THE DEPOSITED MASS IS THEN SHAPED BY A PLUNGER HAVING A RAISED PORTION IN ITS CENTRAL PORTION. THE SHAPED MASS IS THEN HEATED TO GEL THE PLASTISOL. THEREAFTER, THE SHAPED PLASTISOL IS HEATED TO A HIGHER TEMPERATURE TO FUSE AND FOAM THE PLASTISOL.
Inventors
- 👤 Robert Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:04
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/78; B29C70/80; B29C44/00; B29C44/02; B29C44/022; B29C44/12; B29C44/1271; B29C45/00; B29K; B29K2027/00; B29K2027/06; B29K2105/00; B29K2105/0058; B29K2105/0061; B29L; B29L2031/00; B29L2031/56; Y; Y10; Y10S; Y10S264/00; Y10S264/60; Y10S425/00; Y10S425/20; Y10S425/201; Y10S425/809; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/107; Y10T156/1072; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 0
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |