US3224839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for comminuting refuse
Assignee: Individual
•
Filing: 1961-04-06
•
Granted: 1965-12-21
•
Expires: 1981-04-06
Abstract
No abstract record available.
Inventors
- 👤 Norman A Pierson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:24
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/22; B02C17/007; Y; Y10; Y10S; Y10S241/00; Y10S241/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A SYSTEM FOR REDUCING THE AVERAGE PARTICLE SIZE OF A MIXTURE OF HETEROGENEOUS MATERIALS COMPRISING THE COMBINATION OF A ROTATABLY MOUNTED, HORIZONTAL DRUM HAVING PULVERIZING MEANS SECURED TO THE INTERNAL WALL THEREOF FOR EFFECTING AN INITIAL PARTICLE SIZE REDUCTION OF SAID MATERIALS; METERING MEANS AT ONE END OF SAID DRUM FOR CLASSIFYING PULVERIZED MATERIAL DISCHARGED FROM SAID DRUM ACCORDING TO PARTICLE SIZE; AND A GRINDING DEVICE POSITIONED ALONGSIDE SAID HRIZONTAL DRUM AND METERING DEVICE FOR RECEIVING CLASSIFIED MATERIAL DISCHARGED LATERALLY IN A GENERALLY HORIZONTAL DIRECTION FROM SAID METERING DEVICE, SAID GRINDING DEVICE COOPERATING WITH SAID METERING MEANS TO SUBJECT THE MATERIAL OF RELATIVELY LARGER PARTICLE SIZE DISCHARGED FROM SAID DRUM TO MORE EXTENSIVE GRINDING THAN THE MATERIAL OF RELATIVELY SMALLER PARTICLE SIZE WHICH IS DISCHARGED FROM SAID DRUM.
Claim 2
Independent Claim
128 words
A SYSTEM FOR REDUCING THE AVERAGE PARTICLE SIZE OF A MIXTURE OF HETEROGENEOUS MATERIALS COMPRISING THE COMBINATION OF A ROTATABLY MOUNTED, HORIZONTAL DRUM HAVING PULVERIZING MEANS SECURED TO THE INTERNAL WALL THEREOF FOR EFFECTING AN INITIAL PARTICLE SIZE REDUCTION OF SAID MATERIALS; METERING MEANS AT ONE END OF SAID DRUM FOR CLASSIFYING PULVERIZED MATERIAL DISCHARGED FROM SAID DRUM ACCORDING TO PARTICLE SIZE; AND A GRINDING DEVICE POSITIONED ALONGSIDE SAID HRIZONTAL DRUM AND METERING DEVICE FOR RECEIVING CLASSIFIED MATERIAL DISCHARGED LATERALLY IN A GENERALLY HORIZONTAL DIRECTION FROM SAID METERING DEVICE, SAID GRINDING DEVICE COOPERATING WITH SAID METERING MEANS TO SUBJECT THE MATERIAL OF RELATIVELY LARGER PARTICLE SIZE DISCHARGED FROM SAID DRUM TO MORE EXTENSIVE GRINDING THAN THE MATERIAL OF RELATIVELY SMALLER PARTICLE SIZE WHICH IS DISCHARGED FROM SAID DRUM.
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |