US1970993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for condensing vapors
Assignee: Lummus Technology LLC
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Filing: 1930-12-01
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Granted: 1934-08-21
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Expires: 1950-12-01
Abstract
No abstract record available.
Inventors
- 👤 George B Coubrough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:32
CPC Classifications
B; B01; B01D; B01D5/00; B01D5/0078; B01D5/0081; B01D5/0027; B01D5/009
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) | 1937-08-20 | 1938-02-19 | 1938-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-20 | 1942-02-19 | 1942-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-20 | 1946-02-19 | 1946-08-21 | $7700.00 | Window Closed / Lapsed |