US2325573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity responsive apparatus
Assignee: Stein Hall and Co Inc
•
Filing: 1938-11-26
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Granted: 1943-07-27
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Expires: 1958-11-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Thompson
- 👤 George V Caesar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:45
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/12; C08B30/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2506; Y10T137/6416; Y10T137/7722; Y10T137/7758; Y10T137/7761; Y10T137/8593; Y10T137/85954
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) | 1946-07-26 | 1947-01-25 | 1947-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-07-26 | 1951-01-25 | 1951-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-07-26 | 1955-01-25 | 1955-07-27 | $7700.00 | Window Closed / Lapsed |