Patent US3037940A successfully refreshed from Google Patents.
US3037940A
Expired / Lapsed
US
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Method for forming lightweight aggregates
Assignee: Pelm Res and Dev Corp
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Filing: 1959-02-09
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Granted: 1962-06-05
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Expires: 1979-02-09
Abstract
No abstract record available.
Inventors
- 👤 Francis V Pixley
- 👤 George W Pixley
- 👤 Lopinot Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:29
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B20/06; C04B20/061; F; F27; F27B; F27B7/00; F27B7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR PRODUCING LIGHTWEIGHT AGGREGATES WHICH COMPRISES INTRODUCING EXPANDABLE PARTICLES INTO RANDOM MOTION, SUPPLYING HEAT TO THE ZONE AND CONRADOM MOTION, SUPPLYING HEAT TO THE ZONE AND CONCURRENTLY PASSING THE PARTICLES THROUGH SAID ZONE, SAID ZONE BEING INCLINED AT AN ANGLE SUCH THAT THE PASSAGE OF SAID PARTICLES THROUGH THE ZONE IS UPWARD, FORCING THE LIGHTER AND SMALLER PARTICLES UPWARD ALONG THE INCLINED ZONE BY DISPLACEMENT WITH THE HEAVIER AND LARGER PARTICLES SO THAT THE LIGHTER AND SMALLER PARTICLES ARE FORCED UPWARDLY AT A GREATER RATE THAN THE HEAVIER AND LARGER PARTICLES.
Claim 2
Independent Claim
93 words
A METHOD FOR PRODUCING LIGHTWEIGHT AGGREGATES WHICH COMPRISES INTRODUCING EXPANDABLE PARTICLES INTO RANDOM MOTION, SUPPLYING HEAT TO THE ZONE AND CONRADOM MOTION, SUPPLYING HEAT TO THE ZONE AND CONCURRENTLY PASSING THE PARTICLES THROUGH SAID ZONE, SAID ZONE BEING INCLINED AT AN ANGLE SUCH THAT THE PASSAGE OF SAID PARTICLES THROUGH THE ZONE IS UPWARD, FORCING THE LIGHTER AND SMALLER PARTICLES UPWARD ALONG THE INCLINED ZONE BY DISPLACEMENT WITH THE HEAVIER AND LARGER PARTICLES SO THAT THE LIGHTER AND SMALLER PARTICLES ARE FORCED UPWARDLY AT A GREATER RATE THAN THE HEAVIER AND LARGER PARTICLES.
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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) | 1965-06-04 | 1965-12-04 | 1966-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-04 | 1969-12-04 | 1970-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-04 | 1973-12-04 | 1974-06-05 | $7700.00 | Window Closed / Lapsed |