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US2224345A
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Assignee: Individual
•
Filing: 1938-05-12
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Granted: 1940-12-10
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Expires: 1958-05-12
Abstract
No abstract record available.
Inventors
- 👤 James T Heathman
- 👤 Herbert J Hawthorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:31
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0063; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214; B01D17/04; B01D17/044; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3009; Y10T137/3012; Y10T137/3021; Y10T137/304; Y10T137/3052; Y10T137/3068; Y10T137/3084; Y10T137/309; Y10T137/3099; Y10T137/6416; Y10T137/6579
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) | 1943-12-10 | 1944-06-10 | 1944-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-10 | 1948-06-10 | 1948-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-10 | 1952-06-10 | 1952-12-10 | $7700.00 | Window Closed / Lapsed |