US2690344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing and hanging assembly
Assignee: Cooper Industries LLC
•
Filing: 1950-05-08
•
Granted: 1954-09-28
•
Expires: 1970-05-08
Abstract
No abstract record available.
Inventors
- 👤 Allen Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B2200/00; E21B2200/01; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/4958
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1529607A
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US1811013A
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US1997431A
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US2354929A
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US2380388A
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US2582518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |