Patent US3055647A successfully refreshed from Google Patents.
US3055647A
Expired / Lapsed
US
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Compressed gas system
Assignee: Ingersoll Rand Co
•
Filing: 1958-06-03
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Granted: 1962-09-25
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Expires: 1978-06-03
Abstract
No abstract record available.
Inventors
- 👤 William A Morrison
- 👤 Ewald H Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:43
CPC Classifications
E; E21; E21B; E21B1/00; E21B1/12; E21B1/24; E21B1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1520023A
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US1779849A
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US1898772A
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US2101922A
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US2090214A
Cited
US2500931A
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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) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |