Patent US3438423A successfully refreshed from Google Patents.
US3438423A
Expired / Lapsed
US
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Device for operating elongated cords
Assignee: FREDRICK H MELULL
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Filing: 1968-02-28
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Granted: 1969-04-15
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Expires: 1988-02-28
Abstract
No abstract record available.
Inventors
- 👤 Fredrick H Melull
- 👤 Waldemar M Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:38
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/56; E06B9/68; E06B9/70; A; A47; A47H; A47H3/00; A47H3/02; A47H3/04; A47H5/00; A47H5/02; A47H5/032; A47H5/0325; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18832
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |