Patent US3374528A successfully refreshed from Google Patents.
US3374528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper car fabrication
Assignee: Union Tank Car Co
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Filing: 1965-04-01
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Granted: 1968-03-26
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Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Alvin A Bowcutt
- 👤 David J Boliker
- 👤 Polikaitis Bronius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:06
CPC Classifications
B; B61; B61D; B61D7/00; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53961
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
158 words
IN THE MANUFACTURE OF HOOPER CARS, THE METHOD COMPRISING THE STEPS OF: MOUNTING A BOTTOM SUPPORT ASSEMBLY ON A FABRICATING JIG; ATTACHING END AND INTERMEDIATE BULKHEAD ASSEMBLIES IN PLACE ON SAID BOTTOM SUPPORT ASSEMBLY; ATTACHING A ROOF ASSEMBLY ATOP OF SAID END AND INTERMEDIATE BULKHEAD ASSEMBLIES; AFFIXING THE BOTTOM EDGE PORTIONS OF A PAIR OF ELONGATE ONE PIECE METAL SHEETS TO THE RESPECTIVE SIDES OF SAID BOTTOM SUPPORT ASSEMBLY WITH THE MAIN PORTIONS OF SAID SHEETS SUPPORTED RESPECTIVELY ON A PLURALITY OF FORMING ARMS HAVING FORWARD EDGE PORTIONS COMPATIBLE WITH THE CURVED SIDE EDGES OF SAID END AND INTERMEDIATE BULKHEAD ASSEMBLIES; SIMULTANEOUSLY MOVING SAID FORMING ARMS TO FORCE SAID SIDE SHEETS AGAINST SAID SIDE EDGES OF SAID END AND INTERMEDIATE BULKHEAD ASSEMBLIES SO AS TO FIT SAID SIDE SHEETS TO THE CURVATURE OF SAID END AND INTERMEDIATE BULKHEAD ASSEMBLIES; AND AFFIXING SAID SIDE SHEETS IN PLACE AGAINST SAID END AND INTERMEDIATE BULKHEAD ASSEMBLIES TO SEMI-COMPLETE SAID HOPPER CAR.
References Cited (Backward Citations)
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US2671957A
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US2730798A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |