Patent US3389513A successfully refreshed from Google Patents.
US3389513A
Expired / Lapsed
US
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Structural panels and structures containing such panels
Assignee: DONALD H RUGGLES
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Filing: 1966-07-07
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Granted: 1968-06-25
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Expires: 1986-07-07
Abstract
No abstract record available.
Inventors
- 👤 Donald H Ruggles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:07
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; E04B7/10; E04B7/107; E04C; E04C2/00; E04C2/30; E04C2/32; E04D; E04D13/00; E04D13/04; E04D13/0404; E04D13/0481; E04D3/00; E04D3/24; E04D3/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2082116A
Cited
US2191383A
Cited
US3143194A
Cited
US3277616A
Cited
US3151947A
Cited
US3299585A
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 |