US3166830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making prestressed girder
Assignee: Individual
•
Filing: 1962-05-02
•
Granted: 1965-01-26
•
Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Greulich Gerald Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:44
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/29; E04C3/293; E04C3/294; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49625; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE METHOD OF MAKING A GIRDER, COMPRISING PRESTRESSING A SEPERATE CONCRETE TOP CHORD TO PLACE IT UNDER PERMANENT MATERIAL COMPRESSION, RIGIDLY SECURING A METAL WEB TO A METAL BOTTOM CHORD, STRETCHING THE BOTTOM CHORD LENGTHWISE UNTIL IT IS UNDER MATERIAL TENSION AND THEN RIGIDLY SECURING THE WEB TO THE TOP CHORD WHILE MAINTAING THE BOTTOM CHORD STRETCHED.
Claim 2
Independent Claim
57 words
THE METHOD OF MAKING A GIRDER, COMPRISING PRESTRESSING A SEPERATE CONCRETE TOP CHORD TO PLACE IT UNDER PERMANENT MATERIAL COMPRESSION, RIGIDLY SECURING A METAL WEB TO A METAL BOTTOM CHORD, STRETCHING THE BOTTOM CHORD LENGTHWISE UNTIL IT IS UNDER MATERIAL TENSION AND THEN RIGIDLY SECURING THE WEB TO THE TOP CHORD WHILE MAINTAING THE BOTTOM CHORD STRETCHED.
References Cited (Backward Citations)
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Cited
US1770932A
Cited
US2178097A
Cited
US2172806A
Cited
US2887762A
Cited
US2850892A
Cited
US3007233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |