Patent US3071301A successfully refreshed from Google Patents.
Patent US3295486A successfully refreshed from Google Patents.
US3295486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket composed of a panel liner and an annular sealing ring for closures
Assignee: WR Grace and Co
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Filing: 1964-09-01
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Granted: 1967-01-03
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Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Charles W Simons
- 👤 Robert S Holdsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:49
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/10; B65D41/12; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF FORMING A CLOSURE ELEMENT WHICH CONSISTS OF PROVIDING A LACQUERED SHEET OF METAL PLATE, COATING THE LACQUERED SURFACE WITH A LIQUID VINYL RESIN COMPOSITION HAVING BETWEEN ABOUT 15% TO 50% OF A PLASTICIZER BASED ON THE WEIGHT OF THE RESIN, FUSING THE COATING ON SAID LACQUERED SHEET, FORMING CLOSURE SHELLS OF THE COATED SHEETS, DEPOSITING AN ANNULAR RING OF A PLASTICIZED VINYL RESIN COMPOSITION HAVING BETWEEN ABOUT 65% TO 150% OF A PLASTICIZER BASED ON THE WEIGHT OF THE RESIN ON THE INNER SURFACE OF SAID SHELL, AND FUSING THE ANNULAR DEPOSIT IN SAID SHELL.
Claim 2
Independent Claim
98 words
A METHOD OF FORMING A CLOSURE ELEMENT WHICH CONSISTS OF PROVIDING A LACQUERED SHEET OF METAL PLATE, COATING THE LACQUERED SURFACE WITH A LIQUID VINYL RESIN COMPOSITION HAVING BETWEEN ABOUT 15% TO 50% OF A PLASTICIZER BASED ON THE WEIGHT OF THE RESIN, FUSING THE COATING ON SAID LACQUERED SHEET, FORMING CLOSURE SHELLS OF THE COATED SHEETS, DEPOSITING AN ANNULAR RING OF A PLASTICIZED VINYL RESIN COMPOSITION HAVING BETWEEN ABOUT 65% TO 150% OF A PLASTICIZER BASED ON THE WEIGHT OF THE RESIN ON THE INNER SURFACE OF SAID SHELL, AND FUSING THE ANNULAR DEPOSIT IN SAID SHELL.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |