Patent US3258385A successfully refreshed from Google Patents.
US3258385A
Expired / Lapsed
US
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Device for sealing thermoplastic film
Assignee: Millennium Petrochemicals Inc
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Filing: 1961-11-07
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Granted: 1966-06-28
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Expires: 1981-11-07
Abstract
No abstract record available.
Inventors
- 👤 Lake Connie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:37
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/76; B29C65/02; B29C65/18; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/20; B29C66/21; B29C66/40; B29C66/41; B29C66/43; B29C66/70; B29C66/73; B29C66/737; B29C66/7371; B29C66/73711; B29C66/73713; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81433; B29C66/83; B29C66/836; B29C66/8362; B29C66/84; B29C66/861; B29C65/14; B29C66/71; B29K; B29K2025/00; B29K2995/00; B29K2995/0037; B29K2995/005; B29K2995/0053; B29L; B29L2031/00; B29L2031/712
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A THERMOSEALING DEVICE FOR PRODUCING A PEELABLE SEAL THROUGH AT LEAST TWO LAYERS OF SUPERPOSED THERMOPLASTIC SHEET MATERIAL WITHOUT THE APPLICATION OF PRESSURE AND WITHOUT DISTORTION OR SHRINKAGE OF SAID SHEET MATERIAL, SAID DEVICE INCLUDING A DISCONTINUOUS SEALING SURFACE CONSTITUTED BY A PLURALITY OF CLOSELY AND UNIFORMLY SPACED SEALING PROJECTIONS, EACH OF SAID PROJECTIONS INCLUDING A SUBSTANTIALLY FLAT SEALING SURFACE OF SHARPLY REDUCED AREA WHEREBY A PLURALITY OF DISCONTINUOUS AND PEELABLE FUSED AREAS ARE FORMED IN SAID SHEET MATERIAL, EACH OF SAID FUSED AREAS BEING SPACED FROM ADJACENT FUSED AREAS BY AN EXPANSE OF UNSEALED SHEET MATERIAL OF SUBSTANTIALLY GREATER EXTENT THAN THE WIDTH OF ONE OF SAID FUSED AREAS, EACH OF SAID PROJECTIONS BEING OF SUBSTANTIALLY GREATER HEIGHT THAN WIDTH AND INCLUDING AN ENLARGED BASE PORTION AND UPWARDLY INCLINDED SIDE PORTIONS, THE BASE PORTION OF EACH PROJECTION BEING SPACED APART FROM THE BASE PORTIONS OF THE ADJACENT PROJECTIONS A DISTANCE SUBSTANTIALLY GREATER THAN THE WIDTH OF EACH OF SAID SUBSTANTIALLY FLAT SEALING SURFACES, AND MEANS FOR HEATING SAID PROJECTIONS.
Claim 2
Dependent Claim
170 words
A THERMOSEALING DEVICE FOR PRODUCING A PEELABLE SEAL THROUGH AT LEAST TWO LAYERS OF SUPERPOSED THERMOPLASTIC SHEET MATERIAL WITHOUT THE APPLICATION OF PRESSURE AND WITHOUT DISTORTION OR SHRINKAGE OF SAID SHEET MATERIAL, SAID DEVICE INCLUDING A DISCONTINUOUS SEALING SURFACE CONSTITUTED BY A PLURALITY OF CLOSELY AND UNIFORMLY SPACED SEALING PROJECTIONS, EACH OF SAID PROJECTIONS INCLUDING A SUBSTANTIALLY FLAT SEALING SURFACE OF SHARPLY REDUCED AREA WHEREBY A PLURALITY OF DISCONTINUOUS AND PEELABLE FUSED AREAS ARE FORMED IN SAID SHEET MATERIAL, EACH OF SAID FUSED AREAS BEING SPACED FROM ADJACENT FUSED AREAS BY AN EXPANSE OF UNSEALED SHEET MATERIAL OF SUBSTANTIALLY GREATER EXTENT THAN THE WIDTH OF ONE OF SAID FUSED AREAS, EACH OF SAID PROJECTIONS BEING OF SUBSTANTIALLY GREATER HEIGHT THAN WIDTH AND INCLUDING AN ENLARGED BASE PORTION AND UPWARDLY INCLINDED SIDE PORTIONS, THE BASE PORTION OF EACH PROJECTION BEING SPACED APART FROM THE BASE PORTIONS OF THE ADJACENT PROJECTIONS A DISTANCE SUBSTANTIALLY GREATER THAN THE WIDTH OF EACH OF SAID SUBSTANTIALLY FLAT SEALING SURFACES, AND MEANS FOR HEATING SAID PROJECTIONS.
References Cited (Backward Citations)
US2899349A
Cited
US1061039A
Cited
US2464301A
Cited
US2566799A
Cited
US2621139A
Cited
US3066848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |