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Patent US3389524A successfully refreshed from Google Patents.
US3389524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two holer support
Assignee: Individual
•
Filing: 1965-03-05
•
Granted: 1968-06-25
•
Expires: 1985-03-05
Abstract
No abstract record available.
Inventors
- 👤 Weber Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:54
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/18; E04B1/00; E04B1/38; E04B1/41; E04B1/4107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US437470A
Cited
US3124249A
Cited
US2771259A
Cited
US2841255A
Cited
US3121978A
Cited
US3159251A
Cited
US3091423A
Cited
US3286426A
Cited
FR1353181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |