US2839203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filing systems
Assignee: Individual
•
Filing: 1953-04-21
•
Granted: 1958-06-17
•
Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 Becker Otto Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:52
CPC Classifications
B; B42; B42F; B42F15/00; B42F15/007; B42F15/0082; B42F15/0088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US386674A
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US417439A
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US607890A
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US626430A
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US691628A
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GB249183A
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GB300748A
Cited
US2107421A
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US2502261A
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GB623055A
Cited
FR1016345A
Cited
US2604159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |