US3366094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heating apparatus
Assignee: Individual
•
Filing: 1965-11-12
•
Granted: 1968-01-30
•
Expires: 1985-11-12
Abstract
No abstract record available.
Inventors
- 👤 Viessmann Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:51
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/48; F24H1/50; F24H9/00; F24H9/14; F24H9/146
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |