Patent US3500896A successfully refreshed from Google Patents.
US3500896A
Expired / Lapsed
US
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Vertical venetian blinds
Assignee: Yokota Kinzoku Kogyo Inc
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Filing: 1967-11-06
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Granted: 1970-03-17
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Expires: 1987-11-06
Abstract
No abstract record available.
Inventors
- 👤 Hidehiro Endou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:31
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/36; E06B9/362; E06B9/365; E06B9/361; E06B9/364; Y; Y10; Y10S; Y10S160/00; Y10S160/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2828817A
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US2871934A
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US2993535A
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US3134428A
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US3054446A
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US3038534A
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US3022549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |