US3174191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall-forming structure
Assignee: Wood Conversion Co
•
Filing: 1961-06-02
•
Granted: 1965-03-23
•
Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
- 👤 Stillwater Donald J Valsvik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:05
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/56; E04B2/70; E04B2/706; E04B2/707
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US713624A
Cited
US1522708A
Cited
US1830831A
Cited
US1864055A
Cited
GB370527A
Cited
US2017380A
Cited
US2597309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |