Patent US3249252A successfully refreshed from Google Patents.
US3249252A
Expired / Lapsed
US
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Device for removably covering an opening in a structural member
Assignee: General Electric Co
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Filing: 1963-12-20
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Granted: 1966-05-03
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Expires: 1983-12-20
Abstract
No abstract record available.
Inventors
- 👤 Jerry D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:18
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/4251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2042357A
Cited
US3106311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |