US3492029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally insulated pipe
Assignee: J-M A/C PIPE Corp A DE CORP
•
Filing: 1968-11-18
•
Granted: 1970-01-27
•
Expires: 1988-11-18
Abstract
No abstract record available.
Inventors
- 👤 David Walter French
- 👤 John Henry Swensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:37
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/16; F16L59/18; F16L59/182; F16L59/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US247207A
Cited
US528291A
Cited
US530951A
Cited
US666241A
Cited
US2085441A
Cited
US2610028A
Cited
US3208539A
Cited
US2998269A
Cited
US3276929A
Cited
AT228017B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |