US3418399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an insulated pipe structure
Assignee: VERTECS Corp A CORP OF WA
•
Filing: 1965-09-13
•
Granted: 1968-12-24
•
Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 George E Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:00
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/15; B; B29; B29C; B29C33/00; B29C33/44; B29C33/52; B29C70/00; B29C70/58; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2978840A
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US2972968A
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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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |