Patent US3487537A successfully refreshed from Google Patents.
US3487537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a spiral seamed corrugated laminated pipe with uncorrugated interior
Assignee: Individual
•
Filing: 1967-06-01
•
Granted: 1970-01-06
•
Expires: 1987-06-01
Abstract
No abstract record available.
Inventors
- 👤 Jack P Lombardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:25
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/123; B21C37/124; F; F16; F16L; F16L9/00; F16L9/02; F16L9/06; F16L9/16; F16L9/165; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828; Y10T29/51; Y10T29/5136; Y10T29/5137; Y10T29/5138
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1580760A
Cited
US3263321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |