Patent US3309219A successfully refreshed from Google Patents.
US3309219A
Expired / Lapsed
US
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Method of producing an ultraviolet resistant polycarbonate article
Assignee: General Electric Co
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Filing: 1963-07-12
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Granted: 1967-03-14
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Expires: 1983-07-12
Abstract
No abstract record available.
Inventors
- 👤 Theodore L Etherington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; C08L; C08L69/00; C08J2369/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR THE MANUFACTURE OF AN ARTICLE CONSISTING ESSENTIALLY OF POLYCARBONATE RESIN HAVING A HIGH RESISTANCE TO DEGRADATION BY ULTRAVIOLET LIGHT WHICH COMPRISES THE STEPS OF FORMING POLYCARBONATE RESIN INTO AN ARTICLE AND THEN DIPPING SIAD ARTICLE INTO AN OIL BATH CONTAINING AN ULTRAVIOLET ABSORBING COMPOUND SELECTED FROM THE GROUP CONSISTING OF SUBSTITUTED DERIVATIVES OF BENZOPHENONE AND SUBSTITUTED DERIVATIVES OF BENZOTRIAZOLE, SAID BATH BEING MAINTAINED AT A TEMPERATURE OF ABOUT 100*C. TO ABOUT 200*C.
Claim 2
Dependent Claim
75 words
A PROCESS FOR THE MANUFACTURE OF AN ARTICLE CONSISTING ESSENTIALLY OF POLYCARBONATE RESIN HAVING A HIGH RESISTANCE TO DEGRADATION BY ULTRAVIOLET LIGHT WHICH COMPRISES THE STEPS OF FORMING POLYCARBONATE RESIN INTO AN ARTICLE AND THEN DIPPING SIAD ARTICLE INTO AN OIL BATH CONTAINING AN ULTRAVIOLET ABSORBING COMPOUND SELECTED FROM THE GROUP CONSISTING OF SUBSTITUTED DERIVATIVES OF BENZOPHENONE AND SUBSTITUTED DERIVATIVES OF BENZOTRIAZOLE, SAID BATH BEING MAINTAINED AT A TEMPERATURE OF ABOUT 100*C. TO ABOUT 200*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 |