US3309220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an ultraviolet resistant polycarbonate article
Assignee: General Electric Co
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Filing: 1964-04-10
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Granted: 1967-03-14
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Expires: 1984-04-10
Abstract
No abstract record available.
Inventors
- 👤 Mitchell M Osteen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:29
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; C08J2369/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR THE MANUFACTURE OF AN ARTICLE CONSISTING ESSENTIALLY OF POLYCARBONATE RESIN HAVING A HIGH RESISTANCE TO DEGRADATON BY ULTRAVIOLET LIGHT WHICH COMPRISES THE STEPS OF FORMING POLYCARBONATRE RESIN INTO AN ARTICLE AND THEN DIPPING SAID ARTICLE INTO A BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION AND DISPERSION OF AN ULTRAVIOLET ABSORBING COMPOUND SELECTED FROM THE GROUP CONSISTING OF SUBSTITUTED DERIVATIVES OF BENZOTRIAZOLE AND SUBSTITUTED DERIVATIVES OF BENZOPHENONE, SAID BATH BEING MAINTAINED AT A TEMPERATURE OF ABOUT 90*C. TO ABOUT 100*C.
Claim 2
Dependent Claim
82 words
A PROCESS FOR THE MANUFACTURE OF AN ARTICLE CONSISTING ESSENTIALLY OF POLYCARBONATE RESIN HAVING A HIGH RESISTANCE TO DEGRADATON BY ULTRAVIOLET LIGHT WHICH COMPRISES THE STEPS OF FORMING POLYCARBONATRE RESIN INTO AN ARTICLE AND THEN DIPPING SAID ARTICLE INTO A BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION AND DISPERSION OF AN ULTRAVIOLET ABSORBING COMPOUND SELECTED FROM THE GROUP CONSISTING OF SUBSTITUTED DERIVATIVES OF BENZOTRIAZOLE AND SUBSTITUTED DERIVATIVES OF BENZOPHENONE, SAID BATH BEING MAINTAINED AT A TEMPERATURE OF ABOUT 90*C. TO ABOUT 100*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |