Patent US3141222A successfully refreshed from Google Patents.
US3141222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete pipe making apparatus
Assignee: Individual
•
Filing: 1963-02-04
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Granted: 1964-07-21
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Expires: 1983-02-04
Abstract
No abstract record available.
Inventors
- 👤 Steiro Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:48
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/22; B28B21/24; B28B21/26; B28B21/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
CONCRETE PIPE MAKING APPARATUS COMPRISING VERTICALLY POSITIONED AND CONCENTRIC OUTER AND INNER MOLDS THAT DEFINE AN ANNULAR SPACE THEREBETWEEN INTO WHICH LOWSLUMP CONCRETE MIX IS POURED TO FORM A PIPE, MEANS FOR VERTICALLY SHIFTING SAID INNER MOLD IN A DOWNWARD DIRECTION TO STRIP IT FROM THE PIPE, A TOP ACROSS THE UPPER END OF SAID INNER CORE, A DISTRIBUTOR HEAD MOUNTED CENTRALLY ON SAID TOP AND HAVING AN OUTWARDLY EXTENDING DISTRIBUTING ARM MOUNTED FOR ROTATION AROUND SAID TOP TO THEREBY PUSH MIX OUTWARDLY AND INTO SAID ANNULAR SPACE, SAID
Claim 2
Dependent Claim
89 words
CONCRETE PIPE MAKING APPARATUS COMPRISING VERTICALLY POSITIONED AND CONCENTRIC OUTER AND INNER MOLDS THAT DEFINE AN ANNULAR SPACE THEREBETWEEN INTO WHICH LOWSLUMP CONCRETE MIX IS POURED TO FORM A PIPE, MEANS FOR VERTICALLY SHIFTING SAID INNER MOLD IN A DOWNWARD DIRECTION TO STRIP IT FROM THE PIPE, A TOP ACROSS THE UPPER END OF SAID INNER CORE, A DISTRIBUTOR HEAD MOUNTED CENTRALLY ON SAID TOP AND HAVING AN OUTWARDLY EXTENDING DISTRIBUTING ARM MOUNTED FOR ROTATION AROUND SAID TOP TO THEREBY PUSH MIX OUTWARDLY AND INTO SAID ANNULAR SPACE, SAID
References Cited (Backward Citations)
US1473969A
Cited
US1961981A
Cited
US2091385A
Cited
US2165671A
Cited
US2320714A
Cited
US2800700A
Cited
US3047929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |