US2781818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for flanging metallic and asphaltic sheet materials
Assignee: Individual
•
Filing: 1953-01-02
•
Granted: 1957-02-19
•
Expires: 1973-01-02
Abstract
No abstract record available.
Inventors
- 👤 Beckman George
- 👤 Robert John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
D; D21; D21J; D21J1/00; D21J1/16; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1011; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24215; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 0
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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) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |