US3300370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane-polyamide article and method of preparation
Assignee: J E Rhoads & Sons Inc
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Filing: 1965-07-08
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Granted: 1967-01-24
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Expires: 1985-07-08
Abstract
No abstract record available.
Inventors
- 👤 Epstein Michael Mandel
- 👤 Rhoads Joseph Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:36
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31562; Y10T428/31725; Y10T428/31739
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN ARTICLE OF MANUFACTURE COMPRISING A SYNTHETIC POLYAMIDE BASE HAVING INTEGRALLY BONDED ON AT LEAST ONE SURFACE THEREOF A THERMOPLASTIC POLYURETHANE WHICH IS SOLUBLE IN SOLVENTS SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURAN, DIMETHYL FORMAMIDE AND KETONIC SOLVENTS AND SUBSTANTIALLY FREE OF CROSS-LINKAGES, SAID POLYURETHANE HAVING BEEN APPLIED TO THE POLYAMIDE SURFACE AS A PREFORMED SOLID BY PRE-SOFTENING THE SURFACE OF THE SYNTHETIC POLYAMIDE WITH A SOLVENT MIXTURE CONSISTING ESSENTIALLY OF FROM 10-90% BY WEIGHT OF A SOLVENT SOFTENING AGENT FOR THE SYNTHETIC POLYAMIDE AND A BALANCE ESSENTIALLY OF A SOLVENT SOFTENING AGENT FOR THE POLYURETHANE AND UNITING AND MAINTAINING THE SOFTENED SURFACE OF THE SYNTHETIC POLYAMIDE IN FIRM CONTACT WITH THE POLYURETHANE UNTIL A FIRM BOND IS EFFECTED.
Claim 2
Dependent Claim
119 words
AN ARTICLE OF MANUFACTURE COMPRISING A SYNTHETIC POLYAMIDE BASE HAVING INTEGRALLY BONDED ON AT LEAST ONE SURFACE THEREOF A THERMOPLASTIC POLYURETHANE WHICH IS SOLUBLE IN SOLVENTS SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURAN, DIMETHYL FORMAMIDE AND KETONIC SOLVENTS AND SUBSTANTIALLY FREE OF CROSS-LINKAGES, SAID POLYURETHANE HAVING BEEN APPLIED TO THE POLYAMIDE SURFACE AS A PREFORMED SOLID BY PRE-SOFTENING THE SURFACE OF THE SYNTHETIC POLYAMIDE WITH A SOLVENT MIXTURE CONSISTING ESSENTIALLY OF FROM 10-90% BY WEIGHT OF A SOLVENT SOFTENING AGENT FOR THE SYNTHETIC POLYAMIDE AND A BALANCE ESSENTIALLY OF A SOLVENT SOFTENING AGENT FOR THE POLYURETHANE AND UNITING AND MAINTAINING THE SOFTENED SURFACE OF THE SYNTHETIC POLYAMIDE IN FIRM CONTACT WITH THE POLYURETHANE UNTIL A FIRM BOND IS EFFECTED.
References Cited (Backward Citations)
US2349290A
Cited
GB730042A
Cited
US2871218A
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US2978376A
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US2976202A
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US2999764A
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US3033734A
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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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |