US3432447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamable polyethylene/styrene bodies
Assignee: WR Grace and Co
•
Filing: 1963-09-09
•
Granted: 1969-03-11
•
Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 William A Patterson
- 👤 Henry G Schirmer
- 👤 Stanley N Weissman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:37
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2323/00; C08J2323/02; C08J2323/04; C08J2425/00; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/18; Y10S521/00; Y10S521/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A CELLULAR BODY OF A POLYMER OF ETHYLENE CONTAINING 10 TO 30 WEIGHT PERCENT OF POLYSTYRENE HAVING A SMOOTH GLOSSY SURFACE AND SMALL UNIFORMLY DISTRIBUTED, DISCRETE CELLS SUBSTANTIALLY SPHERICAL IN SHAPE AND HAVING AN AVERAGE CELL SIZE IN THE RANGE OF 0.200 TO 0.75 MILLIMETER AND LESS, SAID POLYMER HAVING A PERCENT GEL OF FROM ABOUT 30 TO ABOUT 80.
Claim 2
Dependent Claim
60 words
A CELLULAR BODY OF A POLYMER OF ETHYLENE CONTAINING 10 TO 30 WEIGHT PERCENT OF POLYSTYRENE HAVING A SMOOTH GLOSSY SURFACE AND SMALL UNIFORMLY DISTRIBUTED, DISCRETE CELLS SUBSTANTIALLY SPHERICAL IN SHAPE AND HAVING AN AVERAGE CELL SIZE IN THE RANGE OF 0.200 TO 0.75 MILLIMETER AND LESS, SAID POLYMER HAVING A PERCENT GEL OF FROM ABOUT 30 TO ABOUT 80.
References Cited (Backward Citations)
US2387730A
Cited
US3097150A
Cited
US2948665A
Cited
US3144399A
Cited
US3098831A
Cited
US3098832A
Cited
US3065190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |