Patent US2712835A successfully refreshed from Google Patents.
US2712835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for making partly open rings
Assignee: Madison Management Group Inc
•
Filing: 1952-04-25
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Granted: 1955-07-12
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Expires: 1972-04-25
Abstract
No abstract record available.
Inventors
- 👤 Peter M Sampatacos
- 👤 Jr Edward E Franks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:19
CPC Classifications
B; B21; B21F; B21F11/00; B21F23/00; B21F37/00; B21F37/02
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) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |