US3483976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible screening panel
Assignee: Erie Development Co
•
Filing: 1966-12-07
•
Granted: 1969-12-16
•
Expires: 1986-12-07
Abstract
No abstract record available.
Inventors
- 👤 Charles J Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:48
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/4609; B07B1/4618
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB969768A
Cited
US1916393A
Cited
GB475428A
Cited
DE767619C
Cited
US2267372A
Cited
US2419155A
Cited
US2689379A
Cited
US2617600A
Cited
US2712159A
Cited
US2719524A
Cited
US2740525A
Cited
US3081874A
Cited
US3194397A
Cited
US3228665A
Cited
US3352418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |