US3513291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for electric water heater
Assignee: Louisiana Hydrolec Inc
•
Filing: 1966-08-03
•
Granted: 1970-05-19
•
Expires: 1986-08-03
Abstract
No abstract record available.
Inventors
- 👤 John M Mamoulides
- 👤 Orey L Riley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:42
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2529688A
Cited
GB659352A
Cited
US2584654A
Cited
US2757272A
Cited
US2807702A
Cited
US2788428A
Cited
US3105894A
Cited
US3149224A
Cited
US3240948A
Cited
US3337792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |