Patent US2276111A successfully refreshed from Google Patents.
US1987883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for continuous flow of water
Assignee: HYDRO HEATER CORP
•
Filing: 1931-12-19
•
Granted: 1935-01-15
•
Expires: 1951-12-19
Abstract
No abstract record available.
Inventors
- 👤 John C White
- 👤 Roy W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/03; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/4456; Y10T137/4643; Y10T137/4651; Y10T137/6416; Y10T137/8593; Y10T137/86292; Y10T137/87249; Y10T137/87571; Y10T137/87587; Y10T137/87619
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1938-01-14 | 1938-07-16 | 1939-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-14 | 1942-07-16 | 1943-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-14 | 1946-07-16 | 1947-01-15 | $7700.00 | Window Closed / Lapsed |