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US2454952A
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Measurement of corrosive characteristics of the soil
Assignee: American Gas Association Inc
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Filing: 1946-04-12
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Granted: 1948-11-30
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Expires: 1966-04-12
Abstract
No abstract record available.
Inventors
- 👤 Robert L Starkey
- 👤 Kent M Wight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:43
CPC Classifications
G; G01; G01N; G01N17/00; G01N17/02; Y; Y10; Y10S; Y10S111/00; Y10S111/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US902049A
Cited
US1910021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |