Patent US2099667A successfully refreshed from Google Patents.
US2099667A
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US
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Gas treating apparatus
Assignee: Diamond Power Specialty Corp
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Filing: 1934-05-24
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Granted: 1937-11-16
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Expires: 1954-05-24
Abstract
No abstract record available.
Inventors
- 👤 Curtis L Howse
- 👤 Willis P Thomas
- 👤 Bowers Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:09
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/26
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) | 1940-11-15 | 1941-05-17 | 1941-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-11-15 | 1945-05-17 | 1945-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-11-15 | 1949-05-17 | 1949-11-16 | $7700.00 | Window Closed / Lapsed |