US4422745B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4422745B1 - - Google Patents
Assignee: NAT SCHOOL STUDIOS Inc
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Filing: 1981-07-31
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Granted: 1993-01-12
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Expires: 2001-07-31
Abstract
No abstract record available.
Inventors
- 👤 W Hopson Talmadge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:49
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425; G03B17/24; G03B2217/00; G03B2217/24; G03B2217/242; G03B2217/243; G03B2217/246
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-12 | 1996-07-13 | 1997-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-12 | 2000-07-13 | 2001-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-12 | 2004-07-13 | 2005-01-12 | $7700.00 | Window Closed / Lapsed |