US3187993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor
Assignee: Walker Manufacturing Co
•
Filing: 1962-06-13
•
Granted: 1965-06-08
•
Expires: 1982-06-13
Abstract
No abstract record available.
Inventors
- 👤 Keith H Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:16
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/30; F04C18/34; F01; F01C; F01C1/00; F01C1/30; F01C1/34; F01C1/344; F04C29/00; F04C18/344
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1496222A
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US1660563A
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US1728321A
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US1669779A
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US1861706A
Cited
US1914091A
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US2636667A
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US2558837A
Cited
US2852183A
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US3057304A
Cited
US3070032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |