US2479743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak indicator for sealed receptacles
Assignee: Individual
•
Filing: 1947-04-24
•
Granted: 1949-08-23
•
Expires: 1967-04-24
Abstract
No abstract record available.
Inventors
- 👤 Flemmon P Hall
- 👤 Donald C Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:18
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/32; G01M3/3281; G01M3/329; G01M3/38
Claims Analysis
Total Claims: 0
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US2416619A
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US2407945A
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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) | 1952-08-22 | 1953-02-21 | 1953-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-22 | 1957-02-21 | 1957-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-22 | 1961-02-21 | 1961-08-23 | $7700.00 | Window Closed / Lapsed |