US3453359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making corrugated tubing
Assignee: Pennsylvania Fluorocarbon Co Inc
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Filing: 1968-09-06
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Granted: 1969-07-01
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Expires: 1988-09-06
Abstract
No abstract record available.
Inventors
- 👤 Ira T Clement
- 👤 Walter J Mccaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:31
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/22; B29C53/30; A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; B29C71/00; B29C71/02; F; F16; F16J; F16J3/00; F16J3/04; F16J3/041; F16L; F16L11/00; F16L11/02
Claims Analysis
Total Claims: 0
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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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |