US3448491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for flanging thermoplastic lined pipes
Assignee: Dow Chemical Co
•
Filing: 1964-04-09
•
Granted: 1969-06-10
•
Expires: 1984-04-09
Abstract
No abstract record available.
Inventors
- 👤 Louis J Sosnowski Jr
- 👤 Samuel L Haller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:27
CPC Classifications
B; B29; B29C; B29C57/00; B29C57/005; B29B; B29B13/00; B29B13/02; B29B13/023; B29B13/024; B29B13/025; F; F16; F16L; F16L23/00; F16L23/12; F16L23/125; B29L; B29L2023/00; B29L2023/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49446; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/4992; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |