US2995224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen type structures
Assignee: Alcoa Corp
•
Filing: 1959-08-14
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Granted: 1961-08-08
•
Expires: 1979-08-14
Abstract
No abstract record available.
Inventors
- 👤 William R Butler
- 👤 Paul E Freeman
- 👤 Ronald L Flucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:59
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/01; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/169
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) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |