US3216579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble polyvinylpyrrolidone composition
Assignee: IND BIOLOGY LAB Inc
•
Filing: 1961-05-25
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Granted: 1965-11-09
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Expires: 1981-05-25
Abstract
No abstract record available.
Inventors
- 👤 Morris V Shelanski
- 👤 Levenson Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:54
CPC Classifications
C; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C08; C08K; C08K9/00; C08K9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A WATER-INSOLUBLE PRODUCT CONSISTING ESSENTIALLY OF POLYVINYLPYRROLIDONE ADSORBED ON GRANULAR, HYDRATED, SYNTHETIC CALCIUM SILICATE.
Claim 2
Dependent Claim
14 words
A WATER-INSOLUBLE PRODUCT CONSISTING ESSENTIALLY OF POLYVINYLPYRROLIDONE ADSORBED ON GRANULAR, HYDRATED, SYNTHETIC CALCIUM SILICATE.
References Cited (Backward Citations)
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Cited
US2508602A
Cited
US2900305A
Cited
US2811449A
Cited
US3099626A
Cited
US3033648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |