US1790839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
op berlin
Assignee: —
•
Filing: —
•
Granted: 1931-02-03
•
Expires: 1948-02-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:34
CPC Classifications
D; D21; D21J; D21J1/00
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) | 1934-02-02 | 1934-08-04 | 1935-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-02-02 | 1938-08-04 | 1939-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-02-02 | 1942-08-04 | 1943-02-03 | $7700.00 | Window Closed / Lapsed |