US2993641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor lubrication system
Assignee: Individual
•
Filing: 1958-07-25
•
Granted: 1961-07-25
•
Expires: 1978-07-25
Abstract
No abstract record available.
Inventors
- 👤 Roy T Chew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:04
CPC Classifications
F; F16; F16N; F16N7/00; F16N7/38; F16N7/40; F04; F04B; F04B27/00; F04B27/02; F04B39/00; F04B39/02; F04B39/0223; F04B39/023; F04B39/0261
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1616913A
Cited
US1961451A
Cited
US2025187A
Cited
US2071913A
Cited
US2257707A
Cited
US2504528A
Cited
US2751145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |