Patent US2729307A successfully refreshed from Google Patents.
US2729307A
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Lubricating system
Assignee: DeVilbiss Co
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Filing: 1954-05-10
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Granted: 1956-01-03
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Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 James E Perrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:17
CPC Classifications
F; F01; F01M; F01M9/00; F01M9/12; F04; F04B; F04B39/00; F04B39/0094; F04B39/02; F04B39/0223; F04B39/023; F04B39/0238; F04B39/0246; F16; F16N; F16N7/00; F16N7/14; F16N7/16; F16N7/20; F16N7/22
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |