US2504331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: HARRIET GOLD
•
Filing: 1944-12-06
•
Granted: 1950-04-18
•
Expires: 1964-12-06
Abstract
No abstract record available.
Inventors
- 👤 Hopp Hermann
- 👤 Hopp Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:20
CPC Classifications
G; G09; G09F; G09F7/00; G09F7/02; G09F7/08; G09F7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US445566A
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US1708055A
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FR657702A
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US1901661A
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US1887591A
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US1982131A
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US2073716A
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US2039248A
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US2106375A
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US2406743A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |