US2938535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid supply apparatus
Assignee: BP PLC
•
Filing: 1956-09-24
•
Granted: 1960-05-31
•
Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Brear Norman Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:45
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/28; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6855; Y10T137/6881; Y10T137/8158; Y10T137/8593; Y10T137/85978; Y10T137/85986; Y10T137/85994
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1522752A
Cited
US2507597A
Cited
US2506911A
Cited
US2525074A
Cited
US2537266A
Cited
US2747783A
Cited
US2781798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |