US3798116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealed polyester film
Assignee: Glad Products Co
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Filing: 1971-10-18
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Granted: 1974-03-19
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Expires: 1991-10-18
Abstract
Abstract A FLEXIBLE HEAT SET BIAXIALLY ORIENTED FILM ARTICLE HAVING IN AT LEAST ONE PORTION THEREOF A BEAD TYPE HEAT SEAL WHICH IS PREPARED BY CLAMPING TOGETHER ADJACENT THE PORTION TO BE HEAT SELAED, SUPERIMPOSED PLIES OF A HEAT SET, BIAXIALLY ORIENTED POLYESTER FILM, SAID FILM BEING CHARACTERIZED AS HVING A TENSILE STRENGTH OF AT LEAST 15,000 P.S.I. AND A RATIO OF TENSILE STRENGTH OF AT LAST TO MD DIRECTION BETWEEN ABOUT .67 AND 1.5, IMPOSNG A HEAT ENERGY SOURCE TO FUSE IN A BEAD TYPE SEAL THE SUPERIMPOSED FILM AND MAINTAINING THE PLIES OF FILM PRESSED TOGETHER UNTIL THE SOURCE OF HEAT ENERGY IS RETRACTED THEREFROM.
Inventors
- 👤 H Bassett
- 👤 F Schrage
- 👤 G Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:38
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C65/00; B29C65/02; B29C65/14; B29C66/01; B29C66/03; B29C66/032; B29C66/0322; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/137; B29C66/70; B29C66/71; B29C66/73; B29C66/731; B29C66/7311; B29C66/73115; B29C66/737; B29C66/7371; B29C66/73711; B29C66/73713; B29C66/739; B29C66/7392; B29C66/73921; B29C65/18; B29C65/74; B29C65/743; B29C66/90; B29C66/91; B29C66/919; B29K; B29K2995/00; B29K2995/0037; B29K2995/005; B29K2995/0053; B29K2995/0077; B29L; B29L2031/00; B29L2031/712; B29L2031/7128; Y; Y10; Y10S; Y10S383/00; Y10S383/908; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |