Patent US2093686A successfully refreshed from Google Patents.
US2093686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and means for operating boilers of certain types
Assignee: Individual
•
Filing: 1936-10-27
•
Granted: 1937-09-21
•
Expires: 1956-10-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas E Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:01
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/106
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) | 1940-09-20 | 1941-03-22 | 1941-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-09-20 | 1945-03-22 | 1945-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-09-20 | 1949-03-22 | 1949-09-21 | $7700.00 | Window Closed / Lapsed |