Patent US3458121A successfully refreshed from Google Patents.
US3458121A
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US
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Compressor pulsation dampener
Assignee: Copeland Refrigeration Corp
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Filing: 1967-08-25
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Granted: 1969-07-29
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Expires: 1987-08-25
Abstract
No abstract record available.
Inventors
- 👤 Frank J Gleason Jr
- 👤 Russell E Comstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:19
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0027; F04B39/02; F04B39/0223; F04B39/023; F25; F25B; F25B31/00; F25B31/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2199486A
Cited
US2236112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |