US2717581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically controlled water heater
Assignee: Individual
•
Filing: 1951-06-06
•
Granted: 1955-09-13
•
Expires: 1971-06-06
Abstract
No abstract record available.
Inventors
- 👤 Theodoric B Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:29
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2209; B60H2001/2228; B60H2001/224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1993748A
Cited
US1991186A
Cited
US2106414A
Cited
US2364458A
Cited
US2395416A
Cited
US2414828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |