US2057246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas analyzing process and apparatus
Assignee: Doherty Research Co
•
Filing: 1932-11-26
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Granted: 1936-10-13
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Expires: 1952-11-26
Abstract
No abstract record available.
Inventors
- 👤 John D Morgan
- 👤 Alan P Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:02
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/16; Y; Y10; Y10T; Y10T436/00; 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) | 1939-10-13 | 1940-04-13 | 1940-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-10-13 | 1944-04-13 | 1944-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-10-13 | 1948-04-13 | 1948-10-13 | $7700.00 | Window Closed / Lapsed |