US3307726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layered thermoplastic article
Assignee: Dow Chemical Co
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Filing: 1963-10-24
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Granted: 1967-03-07
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Expires: 1983-10-24
Abstract
No abstract record available.
Inventors
- 👤 Kenneth J Cleereman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:16
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/56; B29C45/5605; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A THERMOPLASTIC ARTICLE HAVING ROTATIONAL SYMMETRY AND A MULTI-LAYERED STRUCTURE, EACH LAYER OF SUCH STRUCTURE HAVING A MOLECULAR ORIENTATION DIFFERENT THAN THE OREITNTATION IN AN ADJACENT LAYER THERETO, WHEREBY MULTIDIRECTIONAL STRENGTH IS IMPARTED TO SAID ARTICLE COMPRISING AN INJECTION MOLDED PLASTIC WITH A BIREFRINGENCE PATTERN THROUGH ITS THICKNESS AT 90* FROM FLOW, SUBSTANTIALLY SIMILAR TO THAT SHOWN IN THE PATTERNS EFFECTED WITH ROTATION IN FIG. 5 OF THE DRAWING HEREIN.
Claim 2
Dependent Claim
70 words
A THERMOPLASTIC ARTICLE HAVING ROTATIONAL SYMMETRY AND A MULTI-LAYERED STRUCTURE, EACH LAYER OF SUCH STRUCTURE HAVING A MOLECULAR ORIENTATION DIFFERENT THAN THE OREITNTATION IN AN ADJACENT LAYER THERETO, WHEREBY MULTIDIRECTIONAL STRENGTH IS IMPARTED TO SAID ARTICLE COMPRISING AN INJECTION MOLDED PLASTIC WITH A BIREFRINGENCE PATTERN THROUGH ITS THICKNESS AT 90* FROM FLOW, SUBSTANTIALLY SIMILAR TO THAT SHOWN IN THE PATTERNS EFFECTED WITH ROTATION IN FIG. 5 OF THE DRAWING HEREIN.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |