US2497898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of changing the composition of a combustible gas by diffusion
Assignee: Beazer East Inc
•
Filing: 1946-11-16
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Granted: 1950-02-21
•
Expires: 1966-11-16
Abstract
No abstract record available.
Inventors
- 👤 Gilbert V Mcgurl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:54
CPC Classifications
C; C10; C10K; C10K3/00; C10K3/06; B; B01; B01D; B01D53/00; B01D53/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1496757A
Cited
US2255069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |