Patent US2328919A successfully refreshed from Google Patents.
US2328919A
Expired / Lapsed
US
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Electrically operated dimpling attachment
Assignee: Glenn L Martin Co
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Filing: 1942-10-07
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Granted: 1943-09-07
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Expires: 1962-10-07
Abstract
No abstract record available.
Inventors
- 👤 Merriman Paul Homer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/02; B21D22/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-09-06 | 1947-03-08 | 1947-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-06 | 1951-03-08 | 1951-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-06 | 1955-03-08 | 1955-09-07 | $7700.00 | Window Closed / Lapsed |