Patent US1536686A successfully refreshed from Google Patents.
US1536686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating system
Assignee: Individual
•
Filing: 1924-05-19
•
Granted: 1925-05-05
•
Expires: 1944-05-19
Abstract
No abstract record available.
Inventors
- 👤 Mullen James
- 👤 Leaman S Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:27
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/081; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/3028; Y10T137/304; Y10T137/3052; Y10T137/3068; Y10T137/7287; Y10T137/7313; Y10T137/7323
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-05-04 | 1928-11-03 | 1929-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-05-04 | 1932-11-03 | 1933-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-05-04 | 1936-11-03 | 1937-05-05 | $7700.00 | Window Closed / Lapsed |