Patent US2959646A successfully refreshed from Google Patents.
Patent US3474514A successfully refreshed from Google Patents.
US3474514A
Expired / Lapsed
US
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Apparatus for making spiral seamed corrugated laminated pipe with uncorrugated interior
Assignee: Individual
•
Filing: 1967-05-19
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Granted: 1969-10-28
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Expires: 1987-05-19
Abstract
No abstract record available.
Inventors
- 👤 Jack P Lombardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:03
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/16; F16L9/165; B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/123; B21C37/124; F16L9/02; F16L9/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828; Y10T29/49908; Y10T29/49915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2862469A
Cited
US3263321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |