US3317641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for molding compounds
Assignee: Individual
•
Filing: 1964-03-11
•
Granted: 1967-05-02
•
Expires: 1984-03-11
Abstract
No abstract record available.
Inventors
- 👤 Wilbur C Heier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:36
CPC Classifications
B; B29; B29C; B29C43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD FOR COMPRESSION MOLDING THERMOSETTING MATERIALS COMPRISING THE STEPS OF: PLACING THERMOSETTING MATERIAL OF MICROPATICLE SIZE HAVING A HIGH VISCOSITY UNDER HEATING AND PRESSURE AND A HIGH BULK FACTOR IN A COMPRESSION MOLD CHAMBER; SEPARATING AT LEAST A PORTION OF THE THERMOSETTING MATERIAL FROM THE MOLD CHAMBER WITH A LYER OF CERAMIC PAPER AND LAYERS OF GLASS CLOTH WHICH ALLOWS PASSAGE OF GASES AND PREVENTS PASSAGE OF VISCOUS MATERIAL; CLOSING THE MOLD CHAMBER AND APPLYING THE FULL PRESSURE OF THE APPARATUS TO CONTROL DENSITY AND FORM A HIGH DENSITY BILLET; HEATING THE MOLD CHAMBER AND THEREBY THE THERMOSETTING MATERIAL; SEALING THE MOLD CHAMBER; AND
Claim 2
Independent Claim
105 words
A METHOD FOR COMPRESSION MOLDING THERMOSETTING MATERIALS COMPRISING THE STEPS OF: PLACING THERMOSETTING MATERIAL OF MICROPATICLE SIZE HAVING A HIGH VISCOSITY UNDER HEATING AND PRESSURE AND A HIGH BULK FACTOR IN A COMPRESSION MOLD CHAMBER; SEPARATING AT LEAST A PORTION OF THE THERMOSETTING MATERIAL FROM THE MOLD CHAMBER WITH A LYER OF CERAMIC PAPER AND LAYERS OF GLASS CLOTH WHICH ALLOWS PASSAGE OF GASES AND PREVENTS PASSAGE OF VISCOUS MATERIAL; CLOSING THE MOLD CHAMBER AND APPLYING THE FULL PRESSURE OF THE APPARATUS TO CONTROL DENSITY AND FORM A HIGH DENSITY BILLET; HEATING THE MOLD CHAMBER AND THEREBY THE THERMOSETTING MATERIAL; SEALING THE MOLD CHAMBER; AND
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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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |