US1779569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of testing the flammable condition of a mixture of air or oxygen with a flammable gas or vapor
Assignee: Individual
•
Filing: 1926-09-14
•
Granted: 1930-10-28
•
Expires: 1946-09-14
Abstract
No abstract record available.
Inventors
- 👤 Norman J Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:24
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/22; G01N25/28; Y; Y10; Y10T; Y10T436/00; Y10T436/12; Y10T436/21; Y10T436/218
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) | 1933-10-27 | 1934-04-28 | 1934-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-10-27 | 1938-04-28 | 1938-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-10-27 | 1942-04-28 | 1942-10-28 | $7700.00 | Window Closed / Lapsed |