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US2214926A
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Desulphurizing gas
Assignee: PEOPLES GAS BY PRODUCTS CORP
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Filing: 1938-11-10
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Granted: 1940-09-17
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Expires: 1958-11-10
Abstract
No abstract record available.
Inventors
- 👤 Robert G Guthrie
- 👤 Oscar J Wilbor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:05
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/76; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/485; C01; C01B; C01B3/00; C01B3/50; C01B3/56; C01B3/58; C10; C10K; C10K1/00; C10K1/34; C01B2203/00; C01B2203/04; C01B2203/0435; C01B2203/0465; C01B2203/0485
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) | 1943-09-17 | 1944-03-18 | 1944-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-17 | 1948-03-18 | 1948-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-17 | 1952-03-18 | 1952-09-17 | $7700.00 | Window Closed / Lapsed |