US1809834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for stabilizing the atmosphere of refrigerating systems
Assignee: Chicago Pneumatic Tool Co LLC
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Filing: 1927-03-25
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Granted: 1931-06-16
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Expires: 1947-03-25
Abstract
No abstract record available.
Inventors
- 👤 Ransom W Davenport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:23
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; F; F25; F25B; F25B47/00; F25B47/003; F25B2309/00; F25B2309/06
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) | 1934-06-15 | 1934-12-15 | 1935-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-15 | 1938-12-15 | 1939-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-15 | 1942-12-15 | 1943-06-16 | $7700.00 | Window Closed / Lapsed |