US3012918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential heat-sealability in differentially crystalline sheet materials, products made therefrom and process and apparatus for making
Assignee: Kendall Co
•
Filing: 1956-06-20
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Granted: 1961-12-12
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Expires: 1976-06-20
Abstract
No abstract record available.
Inventors
- 👤 Charles H Schaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:24
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/70; B29C66/73; A; A61; A61F; A61F13/00; A61F13/00051; A61F13/00072; B26; B26F; B26F1/00; B26F1/26; B29C65/00; B29C65/02; B29C65/10; B29C65/14; B29C65/74; B29C65/747; B29C65/7471; B29C66/01; B29C66/02; B29C66/024; B29C66/0246; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/432; B29C66/45; B29C66/737; B29C66/7371; B29C66/73711; B29C66/7377; B29C66/73771; B29C66/73772; B29C66/73773; B29C66/73774; B29C66/73775; B29C66/73776; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/836; F; F16; F16L; F16L7/00; A61F13/15; A61F13/551; B29C2793/00; B29C2793/0045; B29C65/1403; B29C65/1412; B29C66/71; B29C66/731; B29C66/7311; B29C66/73115; B29K; B29K2027/00; B29K2027/06; B29K2027/08; B29K2027/12; B29K2027/14; B29K2067/00; B29K2071/00; B29K2077/00; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/256; B29K2995/00; B29K2995/0037; B29K2995/0039; B29K2995/0041; B29L; B29L2031/00; B29L2031/712; Y; Y10; Y10S; Y10S425/00; Y10S425/037; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24777; Y10T428/24942; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A FLEXIBLE SHEET OF THERMOPLASTIC POLYMERIC MATERIAL CAPABLE OF CO-EXISTING IN BOTH CRYSTALLINE AND AMORPHOUS STATES, CERTAIN PORTIONS OF THE MATERIAL IN SAID SHEET BEING IN A SUBSTANTIALLY CRYSTALLINE STATE AND HAVING SMOOTH UNDISTORTED CONTINUOUS SURFACES HAVING A UNIFORM SOFTENING POINT TEMPERATURE CHARACTERISTIC OF SAID MATERIAL IN ITS SUBSTANTIALLY CRYSTALLINE STATE, SAID PORTIONS FORMING A SUPPORTING MATRIX SUBSTANTIALLY SURROUNDING AND SEGREGATING DISCRETE PORTIONS OF SAID SHEET CONSTITUTED OF THE SAME POLYMERIC MATERIAL AS SAID MATRIX, MATERIAL OF SAID DISCRETE PORTIONS EXHIBITING SUBSTANTIALLY NO CRYSTALLINITY AND HAVING SOLVENT-FREE SOFTENING POINT TEMPERATURES CHARACTERISTIC OF SAID MATERIAL IN ITS AMORPHOUS STATE AND LOWER THAN THE SOFTENING POINT TEMPERATURE OF THE MATRIX SURFACES, SAID MATERIAL OF SAID DISCRETE PORTIONS EXTENDING THROUGH THE THICKNESS OF THE SHEET.
Claim 2
Dependent Claim
122 words
A FLEXIBLE SHEET OF THERMOPLASTIC POLYMERIC MATERIAL CAPABLE OF CO-EXISTING IN BOTH CRYSTALLINE AND AMORPHOUS STATES, CERTAIN PORTIONS OF THE MATERIAL IN SAID SHEET BEING IN A SUBSTANTIALLY CRYSTALLINE STATE AND HAVING SMOOTH UNDISTORTED CONTINUOUS SURFACES HAVING A UNIFORM SOFTENING POINT TEMPERATURE CHARACTERISTIC OF SAID MATERIAL IN ITS SUBSTANTIALLY CRYSTALLINE STATE, SAID PORTIONS FORMING A SUPPORTING MATRIX SUBSTANTIALLY SURROUNDING AND SEGREGATING DISCRETE PORTIONS OF SAID SHEET CONSTITUTED OF THE SAME POLYMERIC MATERIAL AS SAID MATRIX, MATERIAL OF SAID DISCRETE PORTIONS EXHIBITING SUBSTANTIALLY NO CRYSTALLINITY AND HAVING SOLVENT-FREE SOFTENING POINT TEMPERATURES CHARACTERISTIC OF SAID MATERIAL IN ITS AMORPHOUS STATE AND LOWER THAN THE SOFTENING POINT TEMPERATURE OF THE MATRIX SURFACES, SAID MATERIAL OF SAID DISCRETE PORTIONS EXTENDING THROUGH THE THICKNESS OF THE SHEET.
References Cited (Backward Citations)
US2735797A
Cited
US1156928A
Cited
US2004041A
Cited
US2003494A
Cited
US2162229A
Cited
US2273452A
Cited
US2248038A
Cited
US2408488A
Cited
US2294966A
Cited
US2306399A
Cited
US2364597A
Cited
US2481602A
Cited
US2604423A
Cited
US2475241A
Cited
US2441819A
Cited
US2467034A
Cited
US2622053A
Cited
US2572877A
Cited
US2545243A
Cited
US2691208A
Cited
FR989058A
Cited
US2679469A
Cited
US2676120A
Cited
US2719100A
Cited
US2714571A
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 |