US2429321A
Expired / Lapsed
US
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Assignee: Hilliard Corp
•
Filing: 1943-03-27
•
Granted: 1947-10-21
•
Expires: 1963-03-27
Abstract
No abstract record available.
Inventors
- 👤 Brecque Theodore A La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:08
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D24/00; B01D24/02; B01D24/10; B01D27/00; B01D27/005; B01D27/02; B01D27/04; B01D27/08; B01D29/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |