US2480518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1945-04-07
•
Granted: 1949-08-30
•
Expires: 1965-04-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Strassheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:07
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; B01D27/00; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/23; B01D29/232; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D37/00; B01D37/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/7722; Y10T137/7781; Y10T137/7832
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) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |