Patent US2942469A successfully refreshed from Google Patents.
US2942469A
Expired / Lapsed
US
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Sight glass assembly
Assignee: HAROY CO
•
Filing: 1955-05-19
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Granted: 1960-06-28
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Expires: 1975-05-19
Abstract
No abstract record available.
Inventors
- 👤 Roy Gene Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:15
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1380080A
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US2041132A
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US2071411A
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US2165052A
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US2470925A
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US2461989A
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US2509436A
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US2681034A
Cited
US2768108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |