US2870976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core attachment for picture screens
Assignee: Knox Manufacturing Co
•
Filing: 1953-12-01
•
Granted: 1959-01-27
•
Expires: 1973-12-01
Abstract
No abstract record available.
Inventors
- 👤 Alan P Linquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:10
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB132835A
Cited
US653796A
Cited
US673091A
Cited
US707098A
Cited
US1013882A
Cited
US1759095A
Cited
US2022807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |