Patent DE747251C successfully refreshed from Google Patents.
US1768162A
Expired / Lapsed
US
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Apparatus for treating gases
Assignee: Beazer East Inc
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Filing: 1926-01-29
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Granted: 1930-06-24
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Expires: 1946-01-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick W Sperr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:55
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2774; Y10T137/2802; Y10T137/2815; Y10T137/2822; Y10T137/4673; Y10T137/4807; Y10T137/8158; Y10T137/8175; Y10T137/8342; Y10T137/8593; Y10T137/85954; Y10T137/85978; Y10T137/86131
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-06-23 | 1933-12-23 | 1934-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-23 | 1937-12-23 | 1938-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-23 | 1941-12-23 | 1942-06-24 | $7700.00 | Window Closed / Lapsed |