US3583047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing prestressed concrete poles,piles and the like
Assignee: Nippon Concrete Industries Co Ltd
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Filing: 1969-08-20
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Granted: 1971-06-08
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Expires: 1989-08-20
Abstract
Abstract IN THE MANUFACTURE OF PRESTRESSED CONCRETE POLES, PILES OR THE LIKE, PARTICULARLY OF TUBULAR FORM, ADJUSTABLE DISTANCE PIECES ARE EMPLOYED BETWEEN ONE OF THE END DISCS OF THE FORMWORK AND THE ADJACENT ANCHOR PLATE TO MAINTAIN STEEL TENDONS ARRANGED IN THE FORMWORK IN THEIR STRETCHED STATE. THE USE OF SUCH DISTANCE PIECES ENABLES THE TENDONS TO BE TENSIONED WITH PARTICULAR UNIFORMITY AND FACILITATES MASS PRODUCTION OF THE ARTICLES.
Inventors
- 👤 Minoru Uchiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:47
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/02; B28B23/04; B28B23/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |