Patent US3259507A successfully refreshed from Google Patents.
US3259507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heatsealable seal and food package utilizing same
Assignee: Fort James Corp
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Filing: 1963-02-04
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Granted: 1966-07-05
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Expires: 1983-02-04
Abstract
No abstract record available.
Inventors
- 👤 James E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:50
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/04; B65D75/06; B65D75/08; C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/35; C09J2400/00; C09J2400/20; C09J2400/28; C09J2400/283; Y; Y10; Y10S; Y10S206/00; Y10S206/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A RECLOSABLE FOOD PACKAGE COMPRISING A FLEXIBLE WRAPPER ABOUT A FOOD PRODUCT AND CLOSED OVER A PORTION OF SAID PRODUCT BY FOLDS, A SEALING SHEET OVERLYING SAID FOLDS AND HEAT SEALED THERETO BY A DELAMINABLE ADHESIVE BOND BETWEEN SAID SEATING SHEET AND SAID FOLDS THEREBY ENABLING THE SEALING SHEET TO BE PEELED OFF SAID FOLDS WITHOUT TEARING SAID FOLDS OR SAID SEALING SHEET, WHEREBY, WHEN THE SEALING SHEET IS PEELED OFF AND A PORTION OF THE PRODUCT IS REMOVED, THE PACKAGE CAN BE RECLOSED BY SAID FOLDS, SAID DELAMINABLE ADHESIVE BOND COMPRISING A HEAT SEALED THERMOPLASTIC ADHESIVE LAYER ADJACENT SAID FOLDS AND AT LEAST ONE DELAMINATING LAYER INTERMEDIATE SAID ADHESIVE LAYER AND SAID SEALING SHEET AND HAVING AN INTERFACE LOCATED INTERMEDIATE SAID ADHESIVE LAYER AND SAID SEALING SHEET AND CHARACTERIZED BY A MECHANICAL DISRUPTABLE BOND HAVING A PEEL STRENGTH LESS THAN THE INTERNAL DELAMINATING STRENGTH OF SAID WRAPPER AND SAID SEALING SHEET AND BY BEING NONFUSIBLE AT THE ACTIVATION TEMPERATURE OF SAID ADHESIVE.
Claim 2
Dependent Claim
127 words
A FLEXIBLE SHEET FOR HEAT SEALING TO A SUBSTRATE COMPRISING, A FLEXIBLE BASE SHEET, A DELAMINATING LAYER ADHERED TO AND COVERING AT LEAST A PORTION OF ONE SIDE OF SAID BASE SHEET AND A HEAT-ACTIVATABLE ADHESIVE COATING ADHERED TO AND COATING AT LEAST A MAJOR PORTION OF SAID DELAMINATING LAYER, SAID LAMINATING LAYER HAVING AN INTERFACE LOCATED INTERMEDIATE SAID BASE SHEET AND SAID HEAT-ACTIVATABLE ADHESIVE COATING AND CHARACTERIZED BY A MECHANICALLY DISRUPTABLE BOND WEAKER THAN THE INTERNAL DELAMINATING STRENGTH OF SAID BASE SHEET AND BY BEING NONFUSIBLE AT THE ACTIVATION TEMPERATURE OF SAID ADHESIVE COATING, WHEREBY WHEN SAID SHEET IS HEAT SEALED TO A SUBSTRATE SAID BASE SHEET MAY BE PEELED FROM SAID ADHESIVE COATING AT SAID DELAMINATING INTERFACE WITHOUT TEARING SAID BASE SHEET OR SAID SUBSTRATE.
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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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |