Patent US2889582A successfully refreshed from Google Patents.
US2889582A
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Pipe sealing material
Assignee: NAT CLAY PIPE MANUFACTURERS IN
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Filing: 1955-12-14
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Granted: 1959-06-09
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Expires: 1975-12-14
Abstract
No abstract record available.
Inventors
- 👤 Charles W Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:42
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/05; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0016; C08K5/04; C08K5/14; C08K5/16; C08K5/17; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C09; C09J; C09J151/00; C09J151/003; Y; Y10; Y10S; Y10S264/00; Y10S264/60; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2284741A
Cited
GB591611A
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US2517778A
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GB606936A
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US2558139A
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US2766054A
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US2770476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |