US2723628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bolster assembly
Assignee: Transit Research Corp
•
Filing: 1952-02-04
•
Granted: 1955-11-15
•
Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 William T Rossell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:11
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/122; B60; B60G; B60G11/00; B60G11/32; B60G11/48; B60G11/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US872014A
Cited
DE622080C
Cited
US2237382A
Cited
US2368784A
Cited
GB630294A
Cited
US2609757A
Cited
US2516082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |