US2695753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-water heating system
Assignee: AMERICAN TUBE PRODUCTS Inc
•
Filing: 1951-06-09
•
Granted: 1954-11-30
•
Expires: 1971-06-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Chester H Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:59
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/10; F24D3/1008; F24D3/1016
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |