US2735448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe spacing device
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:37
CPC Classifications
F; F16; F16L; F16L7/00; F16L59/00; F16L59/12; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1457; Y10T24/1486; Y10T24/44; Y10T24/44291; Y10T24/44299; Y10T24/44308
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1122130A
Cited
US2004626A
Cited
US2159622A
Cited
US2287056A
Cited
US2420800A
Cited
US2423986A
Cited
US2551867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |