Patent US1561044A successfully refreshed from Google Patents.
US1561044A
Expired / Lapsed
US
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Baffle tower
Assignee: Individual
•
Filing: 1925-02-20
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Granted: 1925-11-10
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Expires: 1945-02-20
Abstract
No abstract record available.
Inventors
- 👤 Clive M Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:27
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/18; B01J; B01J19/00; B01J19/32; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/32206; B01J2219/32213; B01J2219/32237; B01J2219/32255; B01J2219/32265; B01J2219/32268
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) | 1928-11-09 | 1929-05-11 | 1929-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-11-09 | 1933-05-11 | 1933-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-11-09 | 1937-05-11 | 1937-11-10 | $7700.00 | Window Closed / Lapsed |