US3445922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the forming of longitudinal structural shapes from cast tube
Assignee: Individual
•
Filing: 1966-02-11
•
Granted: 1969-05-27
•
Expires: 1986-02-11
Abstract
No abstract record available.
Inventors
- 👤 George R Leghorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:02
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/14; B22D11/144; B21; B21B; B21B23/00; B21C; B21C37/00; B21C37/06; B22D11/143; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49989; Y10T29/49991; Y10T29/51; Y10T29/5184
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189622708A
Cited
US1908168A
Cited
US2453165A
Cited
US2752648A
Cited
US2940143A
Cited
US2827944A
Cited
US2963758A
Cited
US3193889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |