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US3052140A
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Apparatus and method for manufacture of riveted plate girders
Assignee: Lukens Steel Co
•
Filing: 1958-08-08
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Granted: 1962-09-04
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Expires: 1978-08-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Raymond A Guyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:39
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49634; Y10T29/51; Y10T29/5196; Y10T29/53; Y10T29/53709; Y10T29/5377; Y10T29/53961; Y10T408/00; Y10T408/55; Y10T408/561; Y10T408/5617
Claims Analysis
Total Claims: 0
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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) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |