US3522920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shelf supports
Assignee: AMERICAN METAL WORKS Inc
•
Filing: 1968-09-20
•
Granted: 1970-08-04
•
Expires: 1988-09-20
Abstract
No abstract record available.
Inventors
- 👤 Robert Gray
- 👤 Robert T Halstrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:41
CPC Classifications
A; A47; A47B; A47B57/00; A47B57/30; A47B57/40; A47B57/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1336971A
Cited
FR1140422A
Cited
GB815686A
Cited
US3081717A
Cited
FR1339305A
Cited
US3306466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |