Patent US3369007A successfully refreshed from Google Patents.
US3369007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molecular sieving agent consisting of mainly ball shaped gel grains and a method for their manufacture
Assignee: Pfizer Health AB
•
Filing: 1963-09-24
•
Granted: 1968-02-13
•
Expires: 1983-09-24
Abstract
No abstract record available.
Inventors
- 👤 Flodin Per Gustaf Magnus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:27
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/291; B01J2220/00; B01J2220/50; B01J2220/54; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A MOLECULAR SIEVING AGENT, CONSISTING ESSENTIALLY OF BEADED GEL GRAINS COMPRISING A HIGH MOLECULAR WEIGHT HYDROPHILIC COPOLYMERIZATE OF ALKYLIDENE-BIS-ACRYLAMIDE HAVING THE FORMULA
Claim 2
Dependent Claim
22 words
A MOLECULAR SIEVING AGENT, CONSISTING ESSENTIALLY OF BEADED GEL GRAINS COMPRISING A HIGH MOLECULAR WEIGHT HYDROPHILIC COPOLYMERIZATE OF ALKYLIDENE-BIS-ACRYLAMIDE HAVING THE FORMULA
References Cited (Backward Citations)
GB843374A
Cited
US3200098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |