US2656983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic valve structure
Assignee: GRAYSON GREENAMYER Inc
•
Filing: 1951-07-14
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Granted: 1953-10-27
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Expires: 1971-07-14
Abstract
No abstract record available.
Inventors
- 👤 Grayson John Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:10
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/024; G05D23/026; G05D23/027; G05D23/08; G05D23/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/8158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1919265A
Cited
US1994470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |