Patent US2139351A successfully refreshed from Google Patents.
US2139351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control process and apparatus
Assignee: Shell Development Co
•
Filing: 1937-09-18
•
Granted: 1938-12-06
•
Expires: 1957-09-18
Abstract
No abstract record available.
Inventors
- 👤 Julio G Bejarano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:07
CPC Classifications
C; C10; C10G; C10G11/00; B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; C10G11/10; F; F28; F28F; F28F23/00; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/91
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1941-12-05 | 1942-06-06 | 1942-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-05 | 1946-06-06 | 1946-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-05 | 1950-06-06 | 1950-12-06 | $7700.00 | Window Closed / Lapsed |