US3407151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of expandable and cellular resin products
Assignee: Shell USA Inc
•
Filing: 1964-06-18
•
Granted: 1968-10-22
•
Expires: 1984-06-18
Abstract
No abstract record available.
Inventors
- 👤 Robert H Overcashier
- 👤 Arthur L Fricke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
EXPANDABLE ISOTACTIC POLYPROPYLENE CONSISTING ESSENTIALLY OF SOLID NON-CELLULAR ISOTACTIC POLYPROPYLENE CONTAINING SUBSTANTIALLY UNIFORMLY DISTRIBUTED WITHIN THE POLYPROPYLENE MASS AS SOLE POTENTIAL BLOWING AGENT FINELY DIVIDED DISCRETE MASSES OF A LIQUID WHICH IS SUBSTANTIALLY IMMISCIBLE WITH SAID POLYPROPYLENE, SAID LIQUID BEING SELECTED FROM THE GROUP CONSISTING OF WATER, ACETONE, AMMONIA, METHANOL, ETHANOL, ISOPROPANOL, ACETALKEHYDE, MTHYLFORMATE, AND NITROMETHANE.
Claim 2
Dependent Claim
56 words
EXPANDABLE ISOTACTIC POLYPROPYLENE CONSISTING ESSENTIALLY OF SOLID NON-CELLULAR ISOTACTIC POLYPROPYLENE CONTAINING SUBSTANTIALLY UNIFORMLY DISTRIBUTED WITHIN THE POLYPROPYLENE MASS AS SOLE POTENTIAL BLOWING AGENT FINELY DIVIDED DISCRETE MASSES OF A LIQUID WHICH IS SUBSTANTIALLY IMMISCIBLE WITH SAID POLYPROPYLENE, SAID LIQUID BEING SELECTED FROM THE GROUP CONSISTING OF WATER, ACETONE, AMMONIA, METHANOL, ETHANOL, ISOPROPANOL, ACETALKEHYDE, MTHYLFORMATE, AND NITROMETHANE.
References Cited (Backward Citations)
US2299593A
Cited
US2329322A
Cited
US2372695A
Cited
US2354260A
Cited
US2518454A
Cited
US2512463A
Cited
US2528200A
Cited
US2772322A
Cited
GB773125A
Cited
US2861898A
Cited
US3026272A
Cited
GB836080A
Cited
US3177164A
Cited
US3214234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |