US3507084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tilt-up wall construction
Assignee: Fruehauf Corp
•
Filing: 1967-12-04
•
Granted: 1970-04-21
•
Expires: 1987-12-04
Abstract
No abstract record available.
Inventors
- 👤 James C Jay
- 👤 Glenn W Pownder
- 👤 Ralph C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:02
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190617972A
Cited
FR558686A
Cited
US1714949A
Cited
US2137767A
Cited
GB569636A
Cited
US2590123A
Cited
US3394523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |