US3509907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor valving assembly
Assignee: Copeland Refrigeration Corp
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Filing: 1968-09-16
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Granted: 1970-05-05
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Expires: 1988-09-16
Abstract
No abstract record available.
Inventors
- 👤 Edwin L Gannaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:23
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/104; F04; F04B; F04B39/00; F04B39/10; F04B39/102; F04B39/12; F04B39/125; F16J15/064; F25; F25B; F25B31/00; F25B31/02; F25B31/023; Y; Y10; Y10S; Y10S417/00; Y10S417/902; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7779; Y10T137/7837; Y10T137/7838
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |