US2044557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treating surfaces
Assignee: TRIDEX MACHINE Corp
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Filing: 1934-02-28
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Granted: 1936-06-16
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Expires: 1954-02-28
Abstract
No abstract record available.
Inventors
- 👤 Clayton H Alvord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:08
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/02; B08B3/026; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F25/3123; B01F25/31233; B08B2203/00; B08B2203/007; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0352; Y10T137/2931; Y10T137/3112; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87603
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) | 1939-06-16 | 1939-12-16 | 1940-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-06-16 | 1943-12-16 | 1944-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-06-16 | 1947-12-16 | 1948-06-16 | $7700.00 | Window Closed / Lapsed |