US3381820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening frames and screen-tensioning means therefor
Assignee: SCREEN TEC Inc
•
Filing: 1966-03-07
•
Granted: 1968-05-07
•
Expires: 1986-03-07
Abstract
No abstract record available.
Inventors
- 👤 Methodius C Cecka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:03
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D2201/00; B01D2201/04; B01D2201/0415; B01D2201/40
Claims Analysis
Total Claims: 0
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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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |