US3116972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the absorption of so3 by substantially parallel films of liquid absorbent
Assignee: Sonneborn Chemical and Refining Corp
•
Filing: 1960-05-06
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Granted: 1964-01-07
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Expires: 1980-05-06
Abstract
No abstract record available.
Inventors
- 👤 Angelo J Bevevino
- 👤 Iii Henry Sonneborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:39
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/18; B01J; B01J10/00; B01J10/02; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/80; C01B17/806; C07; C07B; C07B43/00; C07B43/02; B01D2257/00; B01D2257/30; B01D2257/302; B01D2257/40; B01D2257/404; B01D2257/406
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US297476A
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US942181A
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US1002824A
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US1679792A
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US1778571A
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US2004000A
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US1843647A
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US2689783A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |