US3415482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Form for making concrete pipe with wall openings
Assignee: HAWKEYE CONCRETE PRODUCTS CO I
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Filing: 1966-11-09
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Granted: 1968-12-10
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Expires: 1986-11-09
Abstract
No abstract record available.
Inventors
- 👤 Hartzell H Schmidgall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:58
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/86; B28B21/56; B28B21/566
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A CONCRETE PIPE MAKING FORM INCLUDING A HOLLOW CORE SURROUNDED BY A JACKET TO PROVIDE BETWEEN THE CORE AND JACKET AN ANNULAR SPACE FOR RECEIVING CONCRETE, THE IMPROVEMENT COMPRISING SUPPORTING MEANS WITHIN THE CORE, A HOLE-FORMING ELEMENT DISPOSED WITHIN THE CORE IN TRANSVERSE RELATION TO THE CORE AXIS, SAID CORE INCLUDING A WALL PORTION HAVING AN OPENING THERETHROUGH IN ALINE MENT WITH SAID ELEMENT, MEANS MOUNTING SAID ELEMENT ON THE SUPPORT MEANS FOR SELECTIVE PROJECTION THROUGH SAID HOLE AND INTO THE CONCRETE- RECEIVING SPACE AND FOR RETRACTION FROM SAID SPACE, AND OPERATING SHAFT MEANS EXTENDING LENGTHWISE OF THE CORE AND ROCKABLY CARRIED BY THE SUPPORT MEANS AND OPERATIVELY CONNECTED TO AND FOR SELECTIVELY PROJECTING AND RETRACTING SAID ELEMENT.
Claim 2
Dependent Claim
119 words
IN A CONCRETE PIPE MAKING FORM INCLUDING A HOLLOW CORE SURROUNDED BY A JACKET TO PROVIDE BETWEEN THE CORE AND JACKET AN ANNULAR SPACE FOR RECEIVING CONCRETE, THE IMPROVEMENT COMPRISING SUPPORTING MEANS WITHIN THE CORE, A HOLE-FORMING ELEMENT DISPOSED WITHIN THE CORE IN TRANSVERSE RELATION TO THE CORE AXIS, SAID CORE INCLUDING A WALL PORTION HAVING AN OPENING THERETHROUGH IN ALINE MENT WITH SAID ELEMENT, MEANS MOUNTING SAID ELEMENT ON THE SUPPORT MEANS FOR SELECTIVE PROJECTION THROUGH SAID HOLE AND INTO THE CONCRETE- RECEIVING SPACE AND FOR RETRACTION FROM SAID SPACE, AND OPERATING SHAFT MEANS EXTENDING LENGTHWISE OF THE CORE AND ROCKABLY CARRIED BY THE SUPPORT MEANS AND OPERATIVELY CONNECTED TO AND FOR SELECTIVELY PROJECTING AND RETRACTING SAID ELEMENT.
References Cited (Backward Citations)
US1623560A
Cited
US2680276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |