Patent US3872455A successfully refreshed from Google Patents.
US1863002A
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US
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Process for grinding etching plates made of magnesium alloys for planographic printing
Assignee: IG Farbenindustrie AG
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Filing: 1929-07-20
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Granted: 1932-06-14
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Expires: 1949-07-20
Abstract
No abstract record available.
Inventors
- 👤 Beck Adolf
- 👤 Schmidt Walter
- 👤 Dibelka Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:30
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/04
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) | 1935-06-14 | 1935-12-14 | 1936-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-06-14 | 1939-12-14 | 1940-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-06-14 | 1943-12-14 | 1944-06-14 | $7700.00 | Window Closed / Lapsed |