US2600073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulator
Assignee: Shell Development Co
•
Filing: 1949-01-24
•
Granted: 1952-06-10
•
Expires: 1969-01-24
Abstract
No abstract record available.
Inventors
- 👤 Plank Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:38
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D16/163; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7759; Y10T137/776
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US231214A
Cited
US1925301A
Cited
US934083A
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US1357837A
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US2047581A
Cited
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Cited
US2400048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |