US2667993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized container valve
Assignee: OIL EQUIPMENT LAB Inc
•
Filing: 1950-06-24
•
Granted: 1954-02-02
•
Expires: 1970-06-24
Abstract
No abstract record available.
Inventors
- 👤 John E Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:43
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/44; B65D83/48; B65D83/16; B65D83/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US481233A
Cited
US639856A
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US851459A
Cited
US1601961A
Cited
US1886158A
Cited
US2119687A
Cited
US2204015A
Cited
US2506449A
Cited
US2562111A
Cited
US2565050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |