US2748455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a bend in ductile metal tubing
Assignee: Boosey and Hawkes Ltd
•
Filing: 1952-01-02
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Granted: 1956-06-05
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Expires: 1972-01-02
Abstract
No abstract record available.
Inventors
- 👤 Draper Frederick Cecil
- 👤 Hobson John Frederick
- 👤 Sang William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/02; B21D7/022; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/4944; Y10T29/4957; Y10T29/49574; Y10T29/49805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US169392A
Cited
US2285275A
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US1210629A
Cited
US1542983A
Cited
US1714989A
Cited
GB624227A
Cited
US2500813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |