US3488697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leg structure
Assignee: Federal Steel Corp
•
Filing: 1968-04-22
•
Granted: 1970-01-06
•
Expires: 1988-04-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph Lewandowski
- 👤 Robert La Patta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:19
CPC Classifications
F; F16; F16B; F16B12/00; F16B12/44; F16B12/52; F16B7/00; F16B7/04; F16B7/044; F16B7/0446; F16B7/0453; F16B9/00; F16B9/05; F16B9/054; F16B9/056
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1210532A
Cited
US1621260A
Cited
US1806169A
Cited
US2430831A
Cited
US2719383A
Cited
US2896389A
Cited
US3111337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |