US3908902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded or extruded synthetic railroad ties, beams and structural members
Assignee: Collins Synthetics Inc
•
Filing: 1973-10-26
•
Granted: 1975-09-30
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Expires: 1993-10-26
Abstract
Abstract This invention relates to railroad ties and the like, such as beams and structural members, and particularly to articles of recycled wood and to the process of making the same.
Inventors
- 👤 Benjamin P Collins
- 👤 John J Novello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:11
CPC Classifications
E; E01; E01B; E01B3/00; E01B3/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
7 words
A WASTE WOOD STRUCTURAL MEMBER COMPOSED OF:
Claim 2
Dependent Claim
7 words
A WASTE WOOD STRUCTURAL MEMBER COMPOSED OF:
Claim 3
Dependent Claim
18 words
A waste wood structural member as claimed in claim 1 wherein the structural member is a railroad tie.
Claim 4
Dependent Claim
7 words
A waste wood structural member composed of:
Claim 5
Dependent Claim
7 words
A waste wood structural member composed of:
Claim 6
Dependent Claim
18 words
A waste wood structural member as claimed in claim 3 wherein the structural member is a railroad tie.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |