US3459495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the removal of hydrogen sulfide in the air of waste gas
Assignee: Tokyo Gas Co Ltd
•
Filing: 1965-11-04
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Granted: 1969-08-05
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Expires: 1985-11-04
Abstract
No abstract record available.
Inventors
- 👤 Suetoshi Iida
- 👤 Yoshio Marushima
- 👤 Nobuyasu Hasebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:12
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/523; C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/128
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) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |