US1231045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methane-detector.
Assignee: WILLIAM A MCCUTCHEON
•
Filing: 1916-01-27
•
Granted: 1917-06-26
•
Expires: 1936-01-27
Abstract
No abstract record available.
Inventors
- 👤 Charles M Means
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:31
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4077
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1920-06-25 | 1920-12-25 | 1921-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-06-25 | 1924-12-25 | 1925-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-06-25 | 1928-12-25 | 1929-06-26 | $7700.00 | Window Closed / Lapsed |