US2867425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass transfer process and packing units therefor
Assignee: Harshaw Chemical Co
•
Filing: 1956-10-05
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Granted: 1959-01-06
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Expires: 1976-10-05
Abstract
No abstract record available.
Inventors
- 👤 Aaron J Teller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:22
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/10; B01J; B01J19/00; B01J19/30; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30215; B01J2219/304; B01J2219/30466; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH94680A
Cited
FR582972A
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DE425424C
Cited
AT124348B
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GB526609A
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US2552910A
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US2686738A
Cited
US2681324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |