Patent US3213512A successfully refreshed from Google Patents.
US3213512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible core
Assignee: Individual
•
Filing: 1962-01-16
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Granted: 1965-10-26
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Expires: 1982-01-16
Abstract
No abstract record available.
Inventors
- 👤 John P Glass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:14
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/28; B28B7/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A COLLAPSIBLE MOLD CORE COMPRISING A PAIR OF TOP WALL UNITS HAVING TOP WALLS JOINED TOGETHER ALONG THEIR ABUTTING EDGES BY A CENTRAL HINGE, A SIDE WALL UNIT ASSOCIATED WITH EACH TOP WALL UNIT AND HAVING A SIDE WALL ABUTTING THE OUTER EDGE OF ITS ASSOCIATED TOP WALL AND JOINED THERETO BY A HINGE, A HYDRAULIC JACK CONNECTED BETWEEN SAID SIDE WALL UNITS FOR MOVING THEM ABOUT THEIR HINGES AND FOR MOVING SAID TOP WALL UNITS ABOUT THEIR CENTRAL HINGE, AND SLOTTED LINK MEANS CONNECTED BETWEEN EACH SIDE WALL UNIT AND ITS ASSOCIATED TOP WALL UNIT AND CONNECTED BETWEEN SAID TOP WALL UNITS FOR LIMITING SAID HINGE MOVEMENT, SAID WALLS BEING MADE FOR A FLEXIBLE MATERIAL SO THAT THE ACTION OF SAID HYDRAULIC JACK PEELS THEM AWAY FROM CONCRETE OR THE LIKE.
Claim 2
Dependent Claim
132 words
A COLLAPSIBLE MOLD CORE COMPRISING A PAIR OF TOP WALL UNITS HAVING TOP WALLS JOINED TOGETHER ALONG THEIR ABUTTING EDGES BY A CENTRAL HINGE, A SIDE WALL UNIT ASSOCIATED WITH EACH TOP WALL UNIT AND HAVING A SIDE WALL ABUTTING THE OUTER EDGE OF ITS ASSOCIATED TOP WALL AND JOINED THERETO BY A HINGE, A HYDRAULIC JACK CONNECTED BETWEEN SAID SIDE WALL UNITS FOR MOVING THEM ABOUT THEIR HINGES AND FOR MOVING SAID TOP WALL UNITS ABOUT THEIR CENTRAL HINGE, AND SLOTTED LINK MEANS CONNECTED BETWEEN EACH SIDE WALL UNIT AND ITS ASSOCIATED TOP WALL UNIT AND CONNECTED BETWEEN SAID TOP WALL UNITS FOR LIMITING SAID HINGE MOVEMENT, SAID WALLS BEING MADE FOR A FLEXIBLE MATERIAL SO THAT THE ACTION OF SAID HYDRAULIC JACK PEELS THEM AWAY FROM CONCRETE OR THE LIKE.
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |