US2613996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed flow device
Assignee: Old Carco LLC
•
Filing: 1949-05-24
•
Granted: 1952-10-14
•
Expires: 1969-05-24
Abstract
No abstract record available.
Inventors
- 👤 John B Letts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:54
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/24; F23D11/26; F23D11/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US753974A
Cited
US1393316A
Cited
US1644372A
Cited
US1604211A
Cited
US1721326A
Cited
US1685059A
Cited
US2439257A
Cited
US2484037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-14 | 1956-04-14 | 1956-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-14 | 1960-04-14 | 1960-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-14 | 1964-04-14 | 1964-10-14 | $7700.00 | Window Closed / Lapsed |