US2788914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety gauging and sampling hatch
Assignee: Gulf Oil Corp
•
Filing: 1955-05-11
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Granted: 1957-04-16
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Expires: 1975-05-11
Abstract
No abstract record available.
Inventors
- 👤 William C Todt
- 👤 Kenneth W Cummins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:15
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/12; F; F16; F16J; F16J13/00; F16J13/16; F16J13/20
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |