US2827267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas stripping apparatus
Assignee: Griscom Russell Co
•
Filing: 1954-09-17
•
Granted: 1958-03-18
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Expires: 1974-09-17
Abstract
No abstract record available.
Inventors
- 👤 Kenneth B Ris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:17
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0021; Y; Y10; Y10S; Y10S165/00; Y10S165/183; Y10S55/00; Y10S55/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB279526A
Cited
US2152266A
Cited
GB588214A
Cited
US2589262A
Cited
US2545651A
Cited
US2649285A
Cited
US2751199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |