US3012659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sealed polyethylene terephthalate packages
Assignee: Kendall Co
•
Filing: 1956-01-03
•
Granted: 1961-12-12
•
Expires: 1976-01-03
Abstract
No abstract record available.
Inventors
- 👤 Charles H Schaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/10; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/432; B29C66/70; B29C66/71; B29C65/14; B29C65/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PACKAGE COMPRISING CONTENTS DISPOSED BETWEEN A FLEXIBLE FIBROUS SHEET AND AN OPPOSED FLEXIBLE PERFORATED SHEET OF POLYETHYLENE TEREPHTHALATE FILM, SAID SHEETS BEING HEAT-SEALED DIRECTLY TOGETHER IN IMMEDIATE CONTACT IN SPACED AREAS BORDERING SAID CONTENTS TO FORM A CLOSED PACKAGE, PORTIONS OF UNSEALED SURFACE AREAS OF SAID FILM BEING CRYSTALLINE AND PORTIONS OF SAID FIBROUS SHEET SURROUNDED BY SEALED AREAS SPANNING AND BEING VISIBLE THROUGH THE PERFORATIONS IN SAID FILM.
Claim 2
Dependent Claim
70 words
A PACKAGE COMPRISING CONTENTS DISPOSED BETWEEN A FLEXIBLE FIBROUS SHEET AND AN OPPOSED FLEXIBLE PERFORATED SHEET OF POLYETHYLENE TEREPHTHALATE FILM, SAID SHEETS BEING HEAT-SEALED DIRECTLY TOGETHER IN IMMEDIATE CONTACT IN SPACED AREAS BORDERING SAID CONTENTS TO FORM A CLOSED PACKAGE, PORTIONS OF UNSEALED SURFACE AREAS OF SAID FILM BEING CRYSTALLINE AND PORTIONS OF SAID FIBROUS SHEET SURROUNDED BY SEALED AREAS SPANNING AND BEING VISIBLE THROUGH THE PERFORATIONS IN SAID FILM.
References Cited (Backward Citations)
US829652A
Cited
US1075210A
Cited
US2004041A
Cited
US2003494A
Cited
US2149713A
Cited
US2248233A
Cited
US2622053A
Cited
US2545243A
Cited
US2650213A
Cited
US2729585A
Cited
US2719100A
Cited
US2801446A
Cited
US2746898A
Cited
US2795820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |