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Patent US3061978A successfully refreshed from Google Patents.
US3061978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic building frame structure
Assignee: National Steel Corp
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Filing: 1960-02-04
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Granted: 1962-11-06
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Expires: 1980-02-04
Abstract
No abstract record available.
Inventors
- 👤 Elia Edward
- 👤 Herman R Rasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:36
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/02; E04B1/00; E04B1/18; E04B1/24; E04B1/2403; E04B2001/2415; E04B2001/2448; E04B2001/2463; E04B2001/249
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |