US2649067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for making hollow bodies of sheet metal under hydraulic pressure
Assignee: Individual
•
Filing: 1952-02-15
•
Granted: 1953-08-18
•
Expires: 1972-02-15
Abstract
No abstract record available.
Inventors
- 👤 Kranenberg Heinrich Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:09
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/021; B21D26/025; B21D26/029; Y; Y10; Y10S; Y10S220/00; Y10S220/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2531539A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |