Patent US3539302A successfully refreshed from Google Patents.
US3539302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for rapid analysis of trace gas
Assignee: HAYS-REPUBLIC Corp A SUBSIDIARY OF OPTIMUM CONTROL CORPORATION AN OH CORP
•
Filing: 1968-04-10
•
Granted: 1970-11-10
•
Expires: 1988-04-10
Abstract
No abstract record available.
Inventors
- 👤 Hubert Dreckmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:17
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N7/00; G01N7/02; G01N7/04; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/186
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US744132A
Cited
US3223487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |