US2586313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas testing instrument
Assignee: F W DWYER Manufacturing CO
•
Filing: 1947-10-27
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Granted: 1952-02-19
•
Expires: 1967-10-27
Abstract
No abstract record available.
Inventors
- 👤 James G Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:46
CPC Classifications
G; G01; G01N; G01N7/00; G01N7/02; G01N7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR391556A
Cited
US1282409A
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US1223953A
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GB272092A
Cited
US1858399A
Cited
US2047407A
Cited
GB433979A
Cited
US2180795A
Cited
US2181013A
Cited
US2357638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |