US3443345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Covered wood construction element
Assignee: Weather Shield Aluminum Products Inc
•
Filing: 1967-11-30
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Granted: 1969-05-13
•
Expires: 1987-11-30
Abstract
No abstract record available.
Inventors
- 👤 Robert L Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:39
CPC Classifications
E; E04; E04F; E04F19/00; E04F19/02; E04F19/06; E04F19/061; E06; E06B; E06B1/00; E06B1/04; E06B1/34; E06B1/56; E06B1/60; E06B1/62
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) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |