US3470276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing porous riser insulating sleeve
Assignee: SEKISUI SUPONJI KOGYO KK
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Filing: 1966-02-17
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Granted: 1969-09-30
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Expires: 1986-02-17
Abstract
No abstract record available.
Inventors
- 👤 Atsumi Ohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:53
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/10; B22D7/104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |