US3291336A
Expired / Lapsed
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Assignee: Individual
•
Filing: 1965-01-22
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Granted: 1966-12-13
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Expires: 1985-01-22
Abstract
No abstract record available.
Inventors
- 👤 Ermal C Fraze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:26
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/28; B65D17/404; B65D17/401; B65D17/4012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN AN EASY OPENING CONTAINER HAVING A WALL MADE OF SHEET MATERIAL, WHEREIN THE WALL IS WEAKENED BY A GROOVE, THE BOTTOM WALL OF WHICH FORMS A THIN RESIDUAL WEB OF MATERIAL DEFINING A TEAR STRIP THAT MAY BE MANUALLY LIFTED FROM THE PLANE OF THE WALL FOR SEVERANCE OF THE TEAR STRIP BY STRESSING THE RESIDUAL WEB IN SHEAR, THE IMPROVEMENT COMPRISING: A SOLID EXTRUDED RIB FORMED INTEGRLLY IN THE SHEET MATERIA ALONG THE RESIDUAL WEB ON THE LONGIUDINAL SIDE OF THE RESIDUAL WEB AWAY FROM THE TEAR STRIP TO STIFFEN THE SHEET MATERIAL ADJACENT THE RESIDUAL WEB AGAINST FLEXURE IN RESPONSE TO LIFTING OF THE TEAR STRIP THEREBY TO CAUSE THE SHEARING STRESS ACROSS THE RESIDUAL WEB TO RISE ABRUPTLY WHEN THE TEAR STRIP IS LIFTED.
Claim 2
Dependent Claim
128 words
IN AN EASY OPENING CONTAINER HAVING A WALL MADE OF SHEET MATERIAL, WHEREIN THE WALL IS WEAKENED BY A GROOVE, THE BOTTOM WALL OF WHICH FORMS A THIN RESIDUAL WEB OF MATERIAL DEFINING A TEAR STRIP THAT MAY BE MANUALLY LIFTED FROM THE PLANE OF THE WALL FOR SEVERANCE OF THE TEAR STRIP BY STRESSING THE RESIDUAL WEB IN SHEAR, THE IMPROVEMENT COMPRISING: A SOLID EXTRUDED RIB FORMED INTEGRLLY IN THE SHEET MATERIA ALONG THE RESIDUAL WEB ON THE LONGIUDINAL SIDE OF THE RESIDUAL WEB AWAY FROM THE TEAR STRIP TO STIFFEN THE SHEET MATERIAL ADJACENT THE RESIDUAL WEB AGAINST FLEXURE IN RESPONSE TO LIFTING OF THE TEAR STRIP THEREBY TO CAUSE THE SHEARING STRESS ACROSS THE RESIDUAL WEB TO RISE ABRUPTLY WHEN THE TEAR STRIP IS LIFTED.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |