US3501419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose microspherical product
Assignee: Continental Group Inc
•
Filing: 1966-12-12
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Granted: 1970-03-17
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Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 Douglas J Bridgeford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:00
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/12; B01J13/125; B01J39/00; B01J39/08; B01J39/10; C; C08; C08B; C08B1/00; C08B33/00; C08B33/02; C08B5/00; C08F; C08F8/00; C08F8/34; C08F8/44; C08L; C08L3/00; C08L3/04; C08L3/06; C09; C09D; C09D141/00; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/227; D06M15/233; D21H17/33; D21H17/34; D21H17/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2465343A
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US2593786A
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US2722528A
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US2740723A
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US2797141A
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US2797139A
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US2843583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |