US1537568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional-gas-sample collector
Assignee: Individual
•
Filing: 1923-06-13
•
Granted: 1925-05-12
•
Expires: 1943-06-13
Abstract
No abstract record available.
Inventors
- 👤 Sr John R Thompson
- 👤 Jr John R Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:26
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/10; G01N2001/1087; G01N2001/1093
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) | 1928-05-11 | 1928-11-10 | 1929-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-05-11 | 1932-11-10 | 1933-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-05-11 | 1936-11-10 | 1937-05-12 | $7700.00 | Window Closed / Lapsed |