US1511978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for boilers
Assignee: Individual
•
Filing: 1923-03-28
•
Granted: 1924-10-14
•
Expires: 1943-03-28
Abstract
No abstract record available.
Inventors
- 👤 John J Muhlebach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:08
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/42; F22B37/47; F22B37/475; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1819; Y10T137/1834
Claims Analysis
Total Claims: 0
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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) | 1927-10-14 | 1928-04-14 | 1928-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-10-14 | 1932-04-14 | 1932-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-10-14 | 1936-04-14 | 1936-10-14 | $7700.00 | Window Closed / Lapsed |