US2583439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel closure
Assignee: Individual
•
Filing: 1946-07-20
•
Granted: 1952-01-22
•
Expires: 1966-07-20
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Oswald
- 👤 Frederick G Oswald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:51
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2219594A
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US2262670A
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US2234533A
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US2344877A
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US2342614A
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US2430615A
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US2402112A
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US2504701A
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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) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |