US2447581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing cap for vacuum bottles and the like
Assignee: BARNETT COVENT
•
Filing: 1944-07-28
•
Granted: 1948-08-24
•
Expires: 1964-07-28
Abstract
No abstract record available.
Inventors
- 👤 Keith Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:54
CPC Classifications
A; A47; A47J; A47J41/00; A47J41/0005; A47J41/0011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1995350A
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US2330220A
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US2389761A
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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) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |