US3399728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conduit closure apparatus
Assignee: ALLAN R TAYLOR
•
Filing: 1966-12-01
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Granted: 1968-09-03
•
Expires: 1986-12-01
Abstract
No abstract record available.
Inventors
- 👤 Allan R Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:35
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/08; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/061; E21B33/062; E21B33/063; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1759; Y10T137/1767
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |