US1242473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam-superheater.
Assignee: Babcock and Wilcox Co
•
Filing: 1915-07-21
•
Granted: 1917-10-09
•
Expires: 1935-07-21
Abstract
No abstract record available.
Inventors
- 👤 John Prentice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F13/12
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) | 1920-10-08 | 1921-04-09 | 1921-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-10-08 | 1925-04-09 | 1925-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-10-08 | 1929-04-09 | 1929-10-09 | $7700.00 | Window Closed / Lapsed |