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US3019861A
Expired / Lapsed
US
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Metallic building structure
Assignee: National Steel Corp
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Filing: 1959-03-09
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Granted: 1962-02-06
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Expires: 1979-03-09
Abstract
No abstract record available.
Inventors
- 👤 Herman R Rasch
- 👤 Robert J Cummins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:51
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/342
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1532695A
Cited
US1793188A
Cited
US1769733A
Cited
US2549816A
Cited
US2541784A
Cited
GB733332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |