US3064901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulatory steam heating systems
Assignee: Individual
•
Filing: 1958-04-22
•
Granted: 1962-11-20
•
Expires: 1978-04-22
Abstract
No abstract record available.
Inventors
- 👤 Charles G Viner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:22
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/081; F22; F22B; F22B29/00; F22B29/02; F24D1/00
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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |