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Patent US3451255A successfully refreshed from Google Patents.
US3451255A
Expired / Lapsed
US
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Gas analysis apparatus
Assignee: JAMES R NEVILLE
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Filing: 1966-04-07
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Granted: 1969-06-24
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Expires: 1986-04-07
Abstract
No abstract record available.
Inventors
- 👤 James R Neville
- 👤 Kenneth G Ikels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:29
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/46; G01N30/468; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0062; G01N33/0067; G01N30/466
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) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |