Patent US2690747A successfully refreshed from Google Patents.
US2690747A
Expired / Lapsed
US
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Applicator
Assignee: Individual
•
Filing: 1951-03-22
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Granted: 1954-10-05
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Expires: 1971-03-22
Abstract
No abstract record available.
Inventors
- 👤 Frallic Mary Ellen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:16
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/10; A61F13/101; A61F13/102; A61F13/15; A61F13/84; A61F13/8405; A61F2013/00361; A61F2013/00855; A61F2013/00885; A61F2013/00889; A61F2013/15008; A61F2013/15024; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F13/56; A61F2013/5666; A61F2013/5672
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |