US3439527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing gas mains
Assignee: Individual
•
Filing: 1967-05-12
•
Granted: 1969-04-22
•
Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 Carl H Rohrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:56
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/20; G01M3/22; G01M3/223; G01M3/005; G01M3/24; G01M3/243; G01M3/246; G01M3/26; G01M3/28; G01M3/2853
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2731827A
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US1652472A
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US2192155A
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US2273984A
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US2715444A
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GB762629A
Cited
US3085423A
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US3165920A
Cited
US3338088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |