US2881809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-level-controlled filling device
Assignee: OIL EQUIPMENT Mfg CO Inc
•
Filing: 1957-12-18
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Granted: 1959-04-14
•
Expires: 1977-12-18
Abstract
No abstract record available.
Inventors
- 👤 Raymond F Schaetzly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:09
CPC Classifications
B; B67; B67D; B67D1/00; B67D1/08; B67D1/12; B67D1/1202; B67D1/1234; B67D1/1238; G; G05; G05D; G05D9/00; G05D9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2527760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |