US3428470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biological specimen in a cross-linked water-swellable acrylamide type resin and the incorporation of the specimen therein
Assignee: Dow Chemical Co
•
Filing: 1966-06-09
•
Granted: 1969-02-18
•
Expires: 1986-06-09
Abstract
No abstract record available.
Inventors
- 👤 William M Welsh
- 👤 Bobby L Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:11
CPC Classifications
A; A01; A01N; A01N1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A METHOD OF PACKAGING A PRESERVED SPECIMEN OF AN ANIMAL OR AN ORGAN THEREOF WHICH COMPRISES IMMERSING SAID SPECIMEN IN AN AQUEOUS MEDIUM AND GELLING SAID MEDIUM WITH A MIXTURE OF A SURFACTANT AND A WATER SWELLABLE POLYMERIC MATERIAL PRODUCED BY POLYMERIZING AT LEAST ONE MONOMER OF THE FORMULA
Claim 2
Independent Claim
49 words
A METHOD OF PACKAGING A PRESERVED SPECIMEN OF AN ANIMAL OR AN ORGAN THEREOF WHICH COMPRISES IMMERSING SAID SPECIMEN IN AN AQUEOUS MEDIUM AND GELLING SAID MEDIUM WITH A MIXTURE OF A SURFACTANT AND A WATER SWELLABLE POLYMERIC MATERIAL PRODUCED BY POLYMERIZING AT LEAST ONE MONOMER OF THE FORMULA
References Cited (Backward Citations)
US2881155A
Cited
US3083118A
Cited
US3050785A
Cited
US3281263A
Cited
US3157964A
Cited
US3247171A
Cited
US3314909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |