Patent US3415095A successfully refreshed from Google Patents.
US3415095A
Expired / Lapsed
US
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Process and apparatus for producing metal plates with integral stiffeners
Assignee: BRINGEWALD PROCESS CORP
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Filing: 1967-02-08
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Granted: 1968-12-10
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Expires: 1987-02-08
Abstract
No abstract record available.
Inventors
- 👤 August R Bringewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:16
CPC Classifications
B; B21; B21K; B21K23/00; B21H; B21H7/00; B21H8/00; B21J; B21J5/00; B21J5/008; B21J5/02; B23; B23K; B23K20/00; B23K20/04; B23P; B23P15/00; B23P15/12
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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |