US3528634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe hanger
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1968-06-18
•
Granted: 1970-09-15
•
Expires: 1988-06-18
Abstract
No abstract record available.
Inventors
- 👤 John C Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:09
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/08; F16L3/10; F16L3/11; F16L3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1314724A
Cited
US883138A
Cited
US1034444A
Cited
US1022409A
Cited
US1132999A
Cited
US1737989A
Cited
US2214388A
Cited
US2215283A
Cited
US2339565A
Cited
US2372214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |