US3394524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joints for sheet metal
Assignee: Edward Ap Howarth
•
Filing: 1965-11-01
•
Granted: 1968-07-30
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Expires: 1985-11-01
Abstract
No abstract record available.
Inventors
- 👤 Edward A P Howarth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:35
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/36; E04D3/361; E04D3/363; B; B21; B21D; B21D39/00; B21D39/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |