US2103136A
Expired / Lapsed
US
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Method for detecting chemically reactive gases
Assignee: Individual
•
Filing: 1934-06-21
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Granted: 1937-12-21
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Expires: 1954-06-21
Abstract
No abstract record available.
Inventors
- 👤 Bangert Friedrich Karl Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:09
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/08; G; G01; G01N; G01N31/00; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/182; Y10T436/184; Y10T436/19; Y10T436/196666; Y10T436/20; Y10T436/200833; Y10T436/202499
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) | 1940-12-20 | 1941-06-21 | 1941-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-12-20 | 1945-06-21 | 1945-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-12-20 | 1949-06-21 | 1949-12-21 | $7700.00 | Window Closed / Lapsed |