US3150834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of comminuting thermoplastic materials
Assignee: WR Grace and Co
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Filing: 1962-02-19
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Granted: 1964-09-29
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Expires: 1982-02-19
Abstract
No abstract record available.
Inventors
- 👤 Carroll F Doyle
- 👤 Henry P Zerhusen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:38
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN A PROCESS FOR COMMINUTING PARTICULATE THERMOPLASTIC RESINS WHEREIN MATERIAL TO BE COMMINUTED IS PASSED IN A LIQUID STREAM BETWEEN CLOSELY SPACED ROTATING GRINDING SURFACES, THE IMPROVEMENT WHICH COMPRISES PASSING SAID PARTICULATE RESIN THROUGH SAID GRINDING SURFACES IN A STREAM OF WATER SAID WATER BEING THE SOLE DISPERSANT IN AN AMOUNT NOT GREATER THAN ABOUT 3 PARTS OF SAID RESIN PER 7 PARTS BY WEIGHT OF SAID WATER, AND SEPARATING SAID COMMINUTED RESIN PARTICLES FROM SAID WATER.
Claim 2
Dependent Claim
77 words
IN A PROCESS FOR COMMINUTING PARTICULATE THERMOPLASTIC RESINS WHEREIN MATERIAL TO BE COMMINUTED IS PASSED IN A LIQUID STREAM BETWEEN CLOSELY SPACED ROTATING GRINDING SURFACES, THE IMPROVEMENT WHICH COMPRISES PASSING SAID PARTICULATE RESIN THROUGH SAID GRINDING SURFACES IN A STREAM OF WATER SAID WATER BEING THE SOLE DISPERSANT IN AN AMOUNT NOT GREATER THAN ABOUT 3 PARTS OF SAID RESIN PER 7 PARTS BY WEIGHT OF SAID WATER, AND SEPARATING SAID COMMINUTED RESIN PARTICLES FROM SAID WATER.
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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |