Patent US3304955A successfully refreshed from Google Patents.
US3304955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated sheet metal culvert
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1963-08-01
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Granted: 1967-02-21
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Expires: 1983-08-01
Abstract
No abstract record available.
Inventors
- 👤 Theodore C Zinniger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:39
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/17; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49908; Y10T29/49915; Y10T29/49936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
IN A STICHED METALLIC CULVERT PIPE SEAM MADE UP OF OVERLAPPING CORRUGATED SHEETS, A STITCH FOR SAID SEAM LOCATED IN A PAIR OF MATED VALLEYS AT A POINT OF OVERLAP OF SAID SHEETS AND COMPRISED OF INTEGRAL PORTIONS OF THE OVERLAPPING SHEETS DISPLACED OUT OF THE RESPECTIVE NORMAL PLANES OF SAID INTEGRAL PORTIONS OF SAID SHEETS, EACH OF SAID DISPLACED INTEGRAL PORTIONS OF SAID SHEETS FORMING A DISPLACED COMPOSITE WEB DEFINED BY A PAIR OF LATERALLY SPACEDAPART INCISIONS IN SAID SHEETS AND A PAIR OF FOLDS IN SAID SHEETS, EACH OF SAID FOLDS FULLY INTERSECTING EACH OF SAID INCISIONS IN SAID SHEETS AT OTHER THAN INTERIOR ANGLES OF 90*, SAID LATERALLY SPACED-APART INCISIONS BEING ARRANGED GENERALLY PARALLEL TO THE CULVERT SEAM AND THE FOLDS BEING ARRANGED AT ANGLES TO THE CULVERT PIPE SEAM TO RESIST THE SHEAR FORCES TO WHICH SAID STITCH IS SUBJECTED DURING USE AND SAID DISPLACED COMPOSITE WEB LYING WHOLLY WITHIN THE CONFINES OF THE SAID PAIR OF MATED VALLEYS AT THE POINT OF OVERLAP OF SAID SHEETS WHEREBY SAID DISPLACED COMPOSITE WEB IS PROTECTED ON BOTH SIDES BY THE OUTWARDLY PROJECTING RIBS OF THE CORRUGATIONS IN THE OVERLAPPING SHEETS.
Claim 2
Dependent Claim
193 words
IN A STICHED METALLIC CULVERT PIPE SEAM MADE UP OF OVERLAPPING CORRUGATED SHEETS, A STITCH FOR SAID SEAM LOCATED IN A PAIR OF MATED VALLEYS AT A POINT OF OVERLAP OF SAID SHEETS AND COMPRISED OF INTEGRAL PORTIONS OF THE OVERLAPPING SHEETS DISPLACED OUT OF THE RESPECTIVE NORMAL PLANES OF SAID INTEGRAL PORTIONS OF SAID SHEETS, EACH OF SAID DISPLACED INTEGRAL PORTIONS OF SAID SHEETS FORMING A DISPLACED COMPOSITE WEB DEFINED BY A PAIR OF LATERALLY SPACEDAPART INCISIONS IN SAID SHEETS AND A PAIR OF FOLDS IN SAID SHEETS, EACH OF SAID FOLDS FULLY INTERSECTING EACH OF SAID INCISIONS IN SAID SHEETS AT OTHER THAN INTERIOR ANGLES OF 90*, SAID LATERALLY SPACED-APART INCISIONS BEING ARRANGED GENERALLY PARALLEL TO THE CULVERT SEAM AND THE FOLDS BEING ARRANGED AT ANGLES TO THE CULVERT PIPE SEAM TO RESIST THE SHEAR FORCES TO WHICH SAID STITCH IS SUBJECTED DURING USE AND SAID DISPLACED COMPOSITE WEB LYING WHOLLY WITHIN THE CONFINES OF THE SAID PAIR OF MATED VALLEYS AT THE POINT OF OVERLAP OF SAID SHEETS WHEREBY SAID DISPLACED COMPOSITE WEB IS PROTECTED ON BOTH SIDES BY THE OUTWARDLY PROJECTING RIBS OF THE CORRUGATIONS IN THE OVERLAPPING SHEETS.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |