Patent US2750869A successfully refreshed from Google Patents.
US2750869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved air exhaust fittings
Assignee: COLE SEWELL ENGINEERING COMPAN
•
Filing: 1953-01-22
•
Granted: 1956-06-19
•
Expires: 1973-01-22
Abstract
No abstract record available.
Inventors
- 👤 Arthur D Cole
- 👤 Frank L Tourville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:03
CPC Classifications
D; D06; D06F; D06F58/00; D06F58/20; F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1486
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1064951A
Cited
US1397739A
Cited
US1493655A
Cited
US1874083A
Cited
US1935216A
Cited
US2005615A
Cited
US2483547A
Cited
US2579395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |