US3500962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication system for compressors
Assignee: Copeland Industrial LP
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Filing: 1969-05-01
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Granted: 1970-03-17
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Expires: 1989-05-01
Abstract
No abstract record available.
Inventors
- 👤 Erich J Kocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:12
CPC Classifications
F; F04; F04B; F04B41/00; F04B41/06; F04B39/00; F04B39/02; F04B39/0207; F25; F25B; F25B31/00; F25B31/002; F25B1/00; F25B1/10; F25B2400/00; F25B2400/07; F25B2400/075; F25B2700/00; F25B2700/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2274774A
Cited
US2336671A
Cited
US2076332A
Cited
US2159815A
Cited
US2140415A
Cited
US2246244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |