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Patent US3504483A successfully refreshed from Google Patents.
US3504483A
Expired / Lapsed
US
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Apparatus for the removal of sulfur oxides from waste gases
Assignee: Hitachi Ltd
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Filing: 1967-09-08
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Granted: 1970-04-07
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Expires: 1987-09-08
Abstract
No abstract record available.
Inventors
- 👤 Zensuke Tamura
- 👤 Yukio Hishinuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:46
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0423; B01D53/06; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/30; B01D2257/302; B01D2258/00; B01D2258/02; B01D2258/0283; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40086; B01D53/0446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |