US3265785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding a foamed plastic sealing liner having a transparent central portion
Assignee: Chemical Products Corp
•
Filing: 1964-07-31
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Granted: 1966-08-09
•
Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 William C Rainer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:04
CPC Classifications
B; B65; B65D; B65D53/00; B65D53/04; B29; B29C; B29C44/00; B29C44/02; B29C44/022; B29C70/00; B29C70/68; B29C70/78; B29C70/80; B29L; B29L2031/00; B29L2031/26; B29L2031/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF PREPARING CLOSURES CONTAINING A PROTECTIVE AND SEALING LINER MATERIAL CHARACTERIZED BY A TRANSPARENT CENTRAL PORTION WHICH METHOD COMPRISES: DEPOSITING A MEASURED QUANTITY OF A VINLY RESIN PLASTISOL CONTAINING A BLOWING AMOUNT OF A CHEMICAL BLOWING AGENT IN THE INTERIOR OF AN INVERTED CLOSURE; FORMING AND GELLING THE PLASTISOL WITHIN THE CLOSURE UNDER HEAT AND BY APPLICATION OF PRESSURE AT A TEMPERATURE INSUFFICIENT TO SUBSTANTIALLY DECOMPOSE THE CHEMICAL BLOWING AGENT THEREBY PRODUCING A RELATIVELY THIN WEB CENTRAL PORTION HAVING A WEB THICKNESS OF ABOUT 0.5 TO 5 MILS IN THICKNESS AND A RELATIVELY THICH OUTER RING PORTION;
Claim 2
Independent Claim
99 words
A METHOD OF PREPARING CLOSURES CONTAINING A PROTECTIVE AND SEALING LINER MATERIAL CHARACTERIZED BY A TRANSPARENT CENTRAL PORTION WHICH METHOD COMPRISES: DEPOSITING A MEASURED QUANTITY OF A VINLY RESIN PLASTISOL CONTAINING A BLOWING AMOUNT OF A CHEMICAL BLOWING AGENT IN THE INTERIOR OF AN INVERTED CLOSURE; FORMING AND GELLING THE PLASTISOL WITHIN THE CLOSURE UNDER HEAT AND BY APPLICATION OF PRESSURE AT A TEMPERATURE INSUFFICIENT TO SUBSTANTIALLY DECOMPOSE THE CHEMICAL BLOWING AGENT THEREBY PRODUCING A RELATIVELY THIN WEB CENTRAL PORTION HAVING A WEB THICKNESS OF ABOUT 0.5 TO 5 MILS IN THICKNESS AND A RELATIVELY THICH OUTER RING PORTION;
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |