Patent US3648937A successfully refreshed from Google Patents.
US3648937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making small plastic particles
Assignee: Ercon Inc
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Filing: 1969-08-08
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Granted: 1972-03-14
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Expires: 1989-08-08
Abstract
Abstract A process for the comminuting of small particles of organic materials, especially polymeric materials, the process comprising the steps of dispersing a particulate material in a mass of the organic material to be comminuted, comminuting the material, andin the more usual situation- removing the particulate material from the comminuted organic material to leave an uncontaminated particulate product.
Inventors
- 👤 John E Ehrreich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:28
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
The process of claim 1 comprising the additional step of removing said filler particles from said powder.
Claim 2
Dependent Claim
16 words
A process as defined in claim 2 wherein said filler particle is a water-soluble inorganic salt.
Claim 3
Dependent Claim
16 words
A process as defined in claim 2 wherein said filler particle is a water-soluble organic compound.
Claim 4
Dependent Claim
22 words
A process as defined in claim 2 wherein the average diameter of the filler particles before comminuting is up to 0.10 inches.
Claim 5
Dependent Claim
15 words
A process as defined in claim 1 wherein said polymeric material is a thermoplastic resin.
Claim 6
Dependent Claim
24 words
A process as defined in claim 1 wherein said comminuting action is carried out in the presence of a solvent for said filler particles.
Claim 7
Dependent Claim
23 words
A process as defined in claim 1 wherein said filler particle is less resistant to fracture on impact than is said organic material.
Claim 8
Dependent Claim
25 words
A process as defined in claim 1 wherein said filler comprises at least 25% by volume of the mixture to be subjected to comminuting action.
Claim 9
Dependent Claim
16 words
A process as defined in claim 1 wherein said organic polymeric material is a thermosetting resin.
References Cited (Backward Citations)
US2402167A
Cited
US2814075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |