US3332473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen vent structure
Assignee: Individual
•
Filing: 1964-05-08
•
Granted: 1967-07-25
•
Expires: 1984-05-08
Abstract
No abstract record available.
Inventors
- 👤 Roy W Frederickson
- 👤 Harold R Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:19
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/52; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49908; Y10T29/49915; Y10T29/4992; Y10T29/49936; Y10T29/49938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1790504A
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US1487335A
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US1719236A
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US2404197A
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US2568139A
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US3197860A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |