US2997071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe systems
Assignee: Individual
•
Filing: 1957-10-09
•
Granted: 1961-08-22
•
Expires: 1977-10-09
Abstract
No abstract record available.
Inventors
- 👤 John W May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:14
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/12; F16L59/14; F16L59/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1681731A
Cited
US1792855A
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US2360067A
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US2355966A
Cited
US2611567A
Cited
US2663323A
Cited
US2707984A
Cited
US2773512A
Cited
US2823701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |