US2494554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas composition revision
Assignee: Beazer East Inc
•
Filing: 1946-11-14
•
Granted: 1950-01-17
•
Expires: 1966-11-14
Abstract
No abstract record available.
Inventors
- 👤 Earl V Harlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:49
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; C; C10; C10K; C10K3/00; C10K3/06; Y; Y10; Y10S; Y10S48/00; Y10S48/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |