Patent US2744487A successfully refreshed from Google Patents.
US2744487A
Expired / Lapsed
US
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Liquid sight glass
Assignee: Individual
•
Filing: 1953-08-21
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Granted: 1956-05-08
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Expires: 1973-08-21
Abstract
No abstract record available.
Inventors
- 👤 Robert T Moore
- 👤 George G Hornung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:54
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806313A
Cited
US2267556A
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US2594113A
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US2620663A
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US2600148A
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US2681034A
Cited
US2664846A
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US2650562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |