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Patent US2697535A successfully refreshed from Google Patents.
US2697535A
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Assignee: Individual
•
Filing: 1951-06-25
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Granted: 1954-12-21
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Expires: 1971-06-25
Abstract
No abstract record available.
Inventors
- 👤 Oscar J Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:18
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/081; H02G3/083; H02G3/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US928251A
Cited
US1861435A
Cited
US1934300A
Cited
US2143278A
Cited
US2240187A
Cited
US2625288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |