US2463297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing insulating materials
Assignee: Gulf Research and Development Co
•
Filing: 1944-12-21
•
Granted: 1949-03-01
•
Expires: 1964-12-21
Abstract
No abstract record available.
Inventors
- 👤 Muskat Morris
- 👤 Norman D Coggeshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:09
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2075808A
Cited
US2109843A
Cited
US2142648A
Cited
US2085798A
Cited
US2197122A
Cited
US2197123A
Cited
US2222450A
Cited
US2301251A
Cited
US2403289A
Cited
US2423383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |