US2452772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1947-05-28
•
Granted: 1948-11-02
•
Expires: 1967-05-28
Abstract
No abstract record available.
Inventors
- 👤 Laughlin Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:05
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; F; F28; F28F; F28F19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1628955A
Cited
US1715492A
Cited
US1857606A
Cited
US2118510A
Cited
US2174769A
Cited
US2230408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-02 | 1952-05-03 | 1952-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-02 | 1956-05-03 | 1956-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-02 | 1960-05-03 | 1960-11-02 | $7700.00 | Window Closed / Lapsed |