US2171599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making negatives in metal of metal objects of substantially smooth surface
Assignee: METALLIZING ENGINEERING COMPANY Inc
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Filing: 1937-09-07
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Granted: 1939-09-05
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Expires: 1957-09-07
Abstract
No abstract record available.
Inventors
- 👤 William C Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:21
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/18; C23C4/185; B; B41; B41C; B41C3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069; Y10T29/49117; Y10T29/49204; Y10T29/49224
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) | 1942-09-04 | 1943-03-06 | 1943-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-04 | 1947-03-06 | 1947-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-04 | 1951-03-06 | 1951-09-05 | $7700.00 | Window Closed / Lapsed |