US3284158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for removing sulfur compounds from gases
Assignee: Davy McKee AG
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Filing: 1964-03-23
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Granted: 1966-11-08
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Expires: 1984-03-23
Abstract
No abstract record available.
Inventors
- 👤 Johswich Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:09
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/08; B01D53/34; B01D53/46; B01D53/48; C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/30; B01D2257/302; B01D2258/00; B01D2258/02; B01D2258/025; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40077; B01D2259/40081; B01D2259/40083; B01D2259/40088; B01D2259/4009
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
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
Claim 2
Independent Claim
181 words
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |