US3471249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for absorbing h2s gases
Assignee: Babcock and Wilcox Co
•
Filing: 1965-02-02
•
Granted: 1969-10-07
•
Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Henry P Markant
- 👤 Norman D Phillips
- 👤 Indravadan S Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:33
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/06; D21C11/063; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/523
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1580451A
Cited
US1918153A
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US2083213A
Cited
US2772240A
Cited
US2747962A
Cited
US3250591A
Cited
US3323858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |