Patent US3280232A successfully refreshed from Google Patents.
US3280232A
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Centrifugal process for making products with furan resin
Assignee: American Pipe and Construction Co
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Filing: 1964-09-08
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Granted: 1966-10-18
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Lander
- 👤 Delbert A Hausmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:21
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/24; B29C67/242; B29C67/243; B29C41/00; B29C41/02; B29C41/04; B29C41/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR MAKING CHEMICALLY RESISTANT PIPE FROM A MIXTURE OF GRANITIC-TYPE AGGREGATE MATERIAL, FURAN RESIN AND A CATALYST, COMPRISING THE STEPS: FEEDING THE MIXTURE INTO A ROTATING PIPE FORM WHILE SAID FORM IS BEING ROTATED AT AN ANGULAR SPEED LESS THAN THAT WHICH WILL PRODUCE SEGREGATION AND MIGRATION OF THE RESIN, ROTATING THE PIPE FORM AT AN INCREASED ANGULAR SPEED SUFFICIENT TO PRODUCE COMPACTION OF AGGREGATE AND DISPLACEMENT OF EXCESS RESIN TO THE INSIDE OF THE PIPE CASTING UNTIL A THIN LAYER OF RESIN FORMS ON THE INTERIOR SURFACE OF THE CASTING, THEN REDUCING
Claim 2
Dependent Claim
95 words
A PROCESS FOR MAKING CHEMICALLY RESISTANT PIPE FROM A MIXTURE OF GRANITIC-TYPE AGGREGATE MATERIAL, FURAN RESIN AND A CATALYST, COMPRISING THE STEPS: FEEDING THE MIXTURE INTO A ROTATING PIPE FORM WHILE SAID FORM IS BEING ROTATED AT AN ANGULAR SPEED LESS THAN THAT WHICH WILL PRODUCE SEGREGATION AND MIGRATION OF THE RESIN, ROTATING THE PIPE FORM AT AN INCREASED ANGULAR SPEED SUFFICIENT TO PRODUCE COMPACTION OF AGGREGATE AND DISPLACEMENT OF EXCESS RESIN TO THE INSIDE OF THE PIPE CASTING UNTIL A THIN LAYER OF RESIN FORMS ON THE INTERIOR SURFACE OF THE CASTING, THEN REDUCING
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |