Patent US2996843A successfully refreshed from Google Patents.
US2996843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flashing in building construction
Assignee: Dow Chemical Co
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Filing: 1956-05-07
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Granted: 1961-08-22
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Expires: 1976-05-07
Abstract
No abstract record available.
Inventors
- 👤 Arnold O Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:21
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/14; E04D13/147; E04D13/1473; E04D13/1475
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |