Patent US2328257A successfully refreshed from Google Patents.
US2328257A
Expired / Lapsed
US
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Ventilating black-out roller shade
Assignee: GEORGE F MILLER
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Filing: 1941-12-31
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Granted: 1943-08-31
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Expires: 1961-12-31
Abstract
No abstract record available.
Inventors
- 👤 Richard R Butts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:31
CPC Classifications
A; A47; A47H; A47H23/00; A47H23/02; E; E06; E06B; E06B9/00; E06B9/24; E06B9/40
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) | 1946-08-30 | 1947-03-01 | 1947-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-08-30 | 1951-03-01 | 1951-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-08-30 | 1955-03-01 | 1955-08-31 | $7700.00 | Window Closed / Lapsed |