US2005752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing pen-points
Assignee: PFANSTIEHL CHEMICAL CO
•
Filing: 1934-01-13
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Granted: 1935-06-25
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Expires: 1954-01-13
Abstract
No abstract record available.
Inventors
- 👤 Pfanstiehl Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:20
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/76
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) | 1938-06-24 | 1938-12-24 | 1939-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-24 | 1942-12-24 | 1943-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-24 | 1946-12-24 | 1947-06-25 | $7700.00 | Window Closed / Lapsed |