US3490683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas compressor
Assignee: Copeland Industrial LP
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Filing: 1968-06-18
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Granted: 1970-01-20
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Expires: 1988-06-18
Abstract
No abstract record available.
Inventors
- 👤 Erich J Kocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:48
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0005; F04B39/0016; F04B27/00; F04B27/04; F04B27/053; F04B39/0022; F04B39/04; F04B39/06; F04B39/066; F04B39/10; F04B39/102; F04B39/1033; F04B49/00; F04B49/22; F04B49/24; F04B49/243
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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |