US3238690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite beam
Assignee: Reinforced Plastic Container Corp
•
Filing: 1960-03-11
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Granted: 1966-03-08
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Expires: 1980-03-11
Abstract
No abstract record available.
Inventors
- 👤 Wilkins William Burdette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:28
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
AS COMPOSITE BEAM COMPRISING A BOTTOM WALL, SIDE WALLS, AND A TOP COMPRESSION WALL, SAID BOTTOM AND SIDE WALLS BEING FORMED FROM A PLURALITY OF PAPER LAMINATIONS BONDED TOGETHER, EACH OF SAID PAPER LAMINATIONS HAVING A RESILIENT UNIMPREGNATED LAYER BETWEEN THE BONDED SURFACES.
Claim 2
Dependent Claim
43 words
AS COMPOSITE BEAM COMPRISING A BOTTOM WALL, SIDE WALLS, AND A TOP COMPRESSION WALL, SAID BOTTOM AND SIDE WALLS BEING FORMED FROM A PLURALITY OF PAPER LAMINATIONS BONDED TOGETHER, EACH OF SAID PAPER LAMINATIONS HAVING A RESILIENT UNIMPREGNATED LAYER BETWEEN THE BONDED SURFACES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |