US2702505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fume hood
Assignee: Kewaunee Scientific Corp
•
Filing: 1950-07-10
•
Granted: 1955-02-22
•
Expires: 1970-07-10
Abstract
No abstract record available.
Inventors
- 👤 Laurence N Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:41
CPC Classifications
B; B08; B08B; B08B15/00; B08B15/02; B08B15/023; Y; Y10; Y10S; Y10S55/00; Y10S55/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE22228E
Cited
US1624107A
Cited
US1117551A
Cited
US1418731A
Cited
US1578950A
Cited
US1884304A
Cited
US1840371A
Cited
US1741954A
Cited
US1934808A
Cited
US1972917A
Cited
US2120563A
Cited
US2125646A
Cited
US2286115A
Cited
US2365328A
Cited
US2392038A
Cited
US2549042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |