US3479948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Louver
Assignee: EIDP Inc
•
Filing: 1968-02-26
•
Granted: 1969-11-25
•
Expires: 1988-02-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph T Mathews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:17
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/02; F28F25/04; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15; Y; Y10; Y10S; Y10S261/00; Y10S261/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1486084A
Cited
US1785682A
Cited
US2456311A
Cited
US2480562A
Cited
US2962956A
Cited
US2997939A
Cited
US3413905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |