US3498928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing granular oxidizing catalyst for preventing air contamination by carbon monoxide
Assignee: KACHITA CO Ltd
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Filing: 1968-01-05
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Granted: 1970-03-03
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Expires: 1988-01-05
Abstract
No abstract record available.
Inventors
- 👤 Tsurahide Cho
- 👤 Tsutomu Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:14
CPC Classifications
B; B01; B01J; B01J37/00; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8892; B01J37/0009; Y; Y02; Y02A; Y02A50/00; Y02A50/20
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) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |