Patent US3537729A successfully refreshed from Google Patents.
US3537729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion joint for pipe
Assignee: Sunoco Inc
•
Filing: 1967-12-28
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Granted: 1970-11-03
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Expires: 1987-12-28
Abstract
No abstract record available.
Inventors
- 👤 Albert C Burkett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:58
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/18; F16B; F16B2200/00; F16B2200/50; F16B2200/503
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US912671A
Cited
FR908479A
Cited
US3236543A
Cited
US3131642A
Cited
US3244438A
Cited
US3268240A
Cited
US3351361A
Cited
US3265414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |