US3619959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete building
Assignee: Individual
•
Filing: 1969-07-07
•
Granted: 1971-11-16
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Expires: 1989-07-07
Abstract
Abstract AN IMPROVED ELONGATED CONCRETE MEMBER AND A METHOD FOR FABRICATING IMPROVED ELONGAGED PRESTRESSED OR NONPRESTRESSED CONCRETE MEMBERS IN SITAND WITHOUT FORM WORK COMPRISING STRETCHING A SUPPORT COMPRISING A SHEET OR A PLURALITY OF BANDS BETWEEN SPACED END SUPPORTS, APPLYING WET CONCRETE ONTO SAID SUPPORT, AND CURING THE CONCRETE TO FORM A PRESTRESSED OR NONPRESTRESSED CONCRETE MEMBER HAVING A FLAT TOP SURFACE AND A GENERALLY PARABOLIC BOTTOM SURFACE BETWEEN THE END SUPPORTS.
Inventors
- 👤 Sidney A Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:34
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/16; E04B5/17; E04B5/23; E04B5/29; E04B5/32; E04B5/36
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |