Patent US3219734A successfully refreshed from Google Patents.
US3219734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making nacreous cast plastic exhibiting multiple color effects
Assignee: Mearl Corp
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Filing: 1961-06-19
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Granted: 1965-11-23
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Expires: 1981-06-19
Abstract
No abstract record available.
Inventors
- 👤 Mattin Harry Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:28
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/04; Y; Y10; Y10T; Y10T428/00; Y10T428/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
THE METHOD OF MAKING A NACREOUS CAST PLASTIC EXHIBITING MULTIPLE COLORS INTEGRAL WITH SAID PLASTIC, COMPRISING THE STEPS OF POURING A SUSPENSION OF A LIGHTTRANSMITTING PLASTIC CONTAINING AN OPTICALLY COLORED NACREOUS PIGMENT INTO A ROTATING CYLINDER TO DISTRIBUTE SAID SUSPENSION OVER THE WALLS OF THE CYLINDER BY CENTRIFUGAL FORCE AND THEREBY ROTATIONALLY CAST A FIRST PLASTIC LAYER HAVING SAID NACREOUS PIGMENT ORIENTED PARALLEL TO THE WALLS OF THE CYLINDER, PARTIALLY CURING SAID FIRST LAYER, AND POURING A SECOND SUSPENSION OF A LIGHT-TRANSMITTING PLASTIC CONTAINING A NACREOUS PIGMENT HAVING A RANGE OF THICKNESSES DIFFERENT FROM THE RANGE OF THICKNESSES OF THE FIRST MENTIONED NACREOUS PIGMENT AND THUS HAVING A DIFFERENT OPTICAL COLOR INTO SAID ROTATING CYLINER TO DISTRIBUTE THE SAME EVENLY OVER THE SURFACE OF SAID FIRST LAYER AND THEREBY PRODUCE A SECOND PLASTIC LAYER HAVING THE LAST MENTIONED NACREOUS PIGMENT DISTRIBUTED THERETHROUGH ORIENTED PARALLEL TO THE WALLS OF SAID CYLINDER, WHEREBY TO PRODUCE A COMPOSITE PLASTIC LAYER EXHIBITING MULTIPLE COLOR EFFECTS.
Claim 2
Independent Claim
161 words
THE METHOD OF MAKING A NACREOUS CAST PLASTIC EXHIBITING MULTIPLE COLORS INTEGRAL WITH SAID PLASTIC, COMPRISING THE STEPS OF POURING A SUSPENSION OF A LIGHTTRANSMITTING PLASTIC CONTAINING AN OPTICALLY COLORED NACREOUS PIGMENT INTO A ROTATING CYLINDER TO DISTRIBUTE SAID SUSPENSION OVER THE WALLS OF THE CYLINDER BY CENTRIFUGAL FORCE AND THEREBY ROTATIONALLY CAST A FIRST PLASTIC LAYER HAVING SAID NACREOUS PIGMENT ORIENTED PARALLEL TO THE WALLS OF THE CYLINDER, PARTIALLY CURING SAID FIRST LAYER, AND POURING A SECOND SUSPENSION OF A LIGHT-TRANSMITTING PLASTIC CONTAINING A NACREOUS PIGMENT HAVING A RANGE OF THICKNESSES DIFFERENT FROM THE RANGE OF THICKNESSES OF THE FIRST MENTIONED NACREOUS PIGMENT AND THUS HAVING A DIFFERENT OPTICAL COLOR INTO SAID ROTATING CYLINER TO DISTRIBUTE THE SAME EVENLY OVER THE SURFACE OF SAID FIRST LAYER AND THEREBY PRODUCE A SECOND PLASTIC LAYER HAVING THE LAST MENTIONED NACREOUS PIGMENT DISTRIBUTED THERETHROUGH ORIENTED PARALLEL TO THE WALLS OF SAID CYLINDER, WHEREBY TO PRODUCE A COMPOSITE PLASTIC LAYER EXHIBITING MULTIPLE COLOR EFFECTS.
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |