US2133995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for gold plating chromium alloy steels
Assignee: C HOWARD HUNT PEN Co
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Filing: 1937-12-16
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Granted: 1938-10-25
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Expires: 1957-12-16
Abstract
No abstract record available.
Inventors
- 👤 Lukens Hiram Stanhope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:34
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/36; C25D3/00; C25D3/02; C25D3/48; C25D5/38; C25D5/40
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) | 1941-10-24 | 1942-04-25 | 1942-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-24 | 1946-04-25 | 1946-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-24 | 1950-04-25 | 1950-10-25 | $7700.00 | Window Closed / Lapsed |