Patent US3012918A successfully refreshed from Google Patents.
US3012918A
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Differential heat-sealability in differentially crystalline sheet materials, products made therefrom and process and apparatus for making
Assignee: Kendall Co
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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 23:28
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.
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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) | 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 |