US2589537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of generating gases within plastic materials
Assignee: Individual
•
Filing: 1949-09-07
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Granted: 1952-03-18
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Expires: 1969-09-07
Abstract
No abstract record available.
Inventors
- 👤 Pascal J Carpentier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN THE FORMATION OF GAS-EXPANDED CELLULAR MATERIALS ESSENTIALLY CONSISTING OF POLYVINYL CHLORIDE AND TRICRESYL PHOSPHATE, THE METHOD OF GENERATING GAS WITHIN THE MATERIAL WHICH COMPRISES INCORPORATING IN THE INITIAL MATERIAL AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF MALEIC ANHYDRIDE AND PHTHALIC ANHYDRIDE, AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF CALCIUM CARBONATE AND BARIUM PEROXIDE, HEATING SAID MATERIAL AND APPLYING WATER VAPOR THERETO, WHEREBY SAID ANYHYDRIDE IS COVERTED INTO THE CORRESPONDING SAID AND SAID ACID REACTS WITH SAID MEMBER OF SAID GROUP CONSISTING OF CALCIUM CARBONATE AND
Claim 2
Dependent Claim
91 words
IN THE FORMATION OF GAS-EXPANDED CELLULAR MATERIALS ESSENTIALLY CONSISTING OF POLYVINYL CHLORIDE AND TRICRESYL PHOSPHATE, THE METHOD OF GENERATING GAS WITHIN THE MATERIAL WHICH COMPRISES INCORPORATING IN THE INITIAL MATERIAL AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF MALEIC ANHYDRIDE AND PHTHALIC ANHYDRIDE, AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF CALCIUM CARBONATE AND BARIUM PEROXIDE, HEATING SAID MATERIAL AND APPLYING WATER VAPOR THERETO, WHEREBY SAID ANYHYDRIDE IS COVERTED INTO THE CORRESPONDING SAID AND SAID ACID REACTS WITH SAID MEMBER OF SAID GROUP CONSISTING OF CALCIUM CARBONATE AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |