US3411470A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1966-07-18
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Granted: 1968-11-19
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Expires: 1986-07-18
Abstract
No abstract record available.
Inventors
- 👤 Ermal C Fraze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:34
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/383; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN THE FABRICATION OF AN EASY OPENING CONTAINER MADE OF SHEET MATERIAL, A METHOD OF SCORING THE SHEET MATERIAL ALONG A LINE TO FORM A TEAR STRIP FOR MANUAL SERVERANCE FROM THE CONTAINER, CHARACTERIZED BY THE STEPS OF: SUBJECTING THE SHEET MATERIAL TO COMPRESSION ACROSS ITS THICKNESS ALONG SAID LINE TO REDUCE THE THICKNESS OF THE SHEET MATERIAL TO A RESIDUAL WEB DEFINING THE TEAR STRIP WITH THE THICKNESS OF THE WEB LESS THAN 50% OF THE INITIAL THICKNESS OF THE SHEET MATERIAL; AND SIMULTANEOUSLY EXTRUDING A RIB IN THE SHEET MATERIAL IMMEDIATELY ADJACENT THE RESIDUAL WEB TO MINIMIZE TRANSVERSE TENSIONING OF THE RESIDUAL WEB BY THE COMPRESSION STEP.
Claim 2
Dependent Claim
109 words
IN THE FABRICATION OF AN EASY OPENING CONTAINER MADE OF SHEET MATERIAL, A METHOD OF SCORING THE SHEET MATERIAL ALONG A LINE TO FORM A TEAR STRIP FOR MANUAL SERVERANCE FROM THE CONTAINER, CHARACTERIZED BY THE STEPS OF: SUBJECTING THE SHEET MATERIAL TO COMPRESSION ACROSS ITS THICKNESS ALONG SAID LINE TO REDUCE THE THICKNESS OF THE SHEET MATERIAL TO A RESIDUAL WEB DEFINING THE TEAR STRIP WITH THE THICKNESS OF THE WEB LESS THAN 50% OF THE INITIAL THICKNESS OF THE SHEET MATERIAL; AND SIMULTANEOUSLY EXTRUDING A RIB IN THE SHEET MATERIAL IMMEDIATELY ADJACENT THE RESIDUAL WEB TO MINIMIZE TRANSVERSE TENSIONING OF THE RESIDUAL WEB BY THE COMPRESSION STEP.
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) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |