Patent US2983570A successfully refreshed from Google Patents.
US2983570A
Expired / Lapsed
US
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Porous moulds for manufacturing plastic articles
Assignee: Pirelli and C SpA
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Filing: 1959-10-28
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Granted: 1961-05-09
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Expires: 1979-10-28
Abstract
No abstract record available.
Inventors
- 👤 Lux Benno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:08
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/38; B29C33/3814; B29K; B29K2021/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/249967; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A POROUS MOULD FOR MOULDING UNDER PRESSURE RUBBER ARTICLES COMPRISING: A POROUS METALLIC BODY HAVING A STRATUM IMMEDIATELY UNDERLYING AND INCLUDING ITS MOULDING SURFACE WHICH IS IMPREGNATED WITH A POROUS, ANTI-ADHESIVE, SINTERED, PLASTIC MATERIAL THAT PENETRATES FOR A SELECTED LIMITED DEPTH INTO AND PARTIALLY FILLS THE PORES OF SAID STRATUM IMMEDIATELY ADJACENT ITS MOULDING SURFACE, WHEREBY SAID SURFACE HAS A SMALLER POROSITY THAN THAT OF SAID BODY.
Claim 2
Dependent Claim
67 words
A POROUS MOULD FOR MOULDING UNDER PRESSURE RUBBER ARTICLES COMPRISING: A POROUS METALLIC BODY HAVING A STRATUM IMMEDIATELY UNDERLYING AND INCLUDING ITS MOULDING SURFACE WHICH IS IMPREGNATED WITH A POROUS, ANTI-ADHESIVE, SINTERED, PLASTIC MATERIAL THAT PENETRATES FOR A SELECTED LIMITED DEPTH INTO AND PARTIALLY FILLS THE PORES OF SAID STRATUM IMMEDIATELY ADJACENT ITS MOULDING SURFACE, WHEREBY SAID SURFACE HAS A SMALLER POROSITY THAN THAT OF SAID BODY.
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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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |