US3701453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic ring pull easy open end
Assignee: Primerica Inc
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Filing: 1971-06-17
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Granted: 1972-10-31
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Expires: 1991-06-17
Abstract
Abstract An easy open end for a container which incorporates an injection molded, plastic opening feature having no exposed, sharp, bare edges. An adhesive promoting coating system permanently bonds the plastic to the inside surface of the end.
Inventors
- 👤 John Robert Platt
- 👤 Stanley Edward Rohowetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:27
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/50; B65D17/506; B65D17/507; B65D17/508
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
28 words
The combination of claim 1 wherein the outside surface of the rim is covered with a release coating, and the easy open end is comprised of a metal.
Claim 2
Dependent Claim
24 words
The combination of claim 2 wherein the inside peripheral surface of the rim is located beneath the outside peripheral surface of the panel insert.
Claim 3
Dependent Claim
26 words
The combination of claim 3 wherein the handle means comprises a plastic, ring pull tab, and the easy open end is comprised of a metal-plastic laminate.
Claim 4
Dependent Claim
34 words
The combination of claim 3 wherein the rim is provided with an undercut in the area adjacent the plastic-enclosed center panel insert into which said insert may be snapped after opening of the container.
Claim 5
Dependent Claim
37 words
The combination of claim 5 wherein the adhesive plastic member comprises by weight 20 to 60 percent matrix resin, 10 to 30 percent plasticizing resin, 10 to 50 percent inorganic filler and 1 to 5 percent pigment.
Claim 6
Dependent Claim
29 words
The combination of claim 6 wherein the adhesive coating system comprises a base coat of an epoxy urea formaldehyde and a top coat of an ethylene acrylic acid copolymer.
Claim 7
Dependent Claim
14 words
The combination of claim 7 wherein the release coating comprises an epoxy urea formaldehyde.
Claim 8
Dependent Claim
37 words
The combination of claim 8 wherein the matrix resin comprises an ethylene acrylic copolymer, the plasticizing resin comprises ethylene acrylic copolymer and low density polyethylene, the inorganic filler comprises natural silica, and the pigment comprises titanium dioxide.
Claim 9
Dependent Claim
12 words
The combination of claim 9 wherein the easy open end is hermetic.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |