US2438516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polystyrene electric insulating materials
Assignee: International Standard Electric Corp
•
Filing: 1942-06-17
•
Granted: 1948-03-30
•
Expires: 1962-06-17
Abstract
No abstract record available.
Inventors
- 👤 New Archibald Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:23
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/442; C; C08; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1617237A
Cited
US1891601A
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US2056796A
Cited
GB491576A
Cited
US2272996A
Cited
US2193613A
Cited
US2161558A
Cited
US2213201A
Cited
US2285562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |