US2586887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzilmonohydrazon blowing-agent for preparing porous thermoplastic resins
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1948-09-28
•
Granted: 1952-02-26
•
Expires: 1968-09-28
Abstract
No abstract record available.
Inventors
- 👤 Georgette Van Gaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:01
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/104; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/30; Y; Y10; Y10S; Y10S521/00; Y10S521/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T442/00; Y10T442/20; Y10T442/2139
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
33 words
A PROCESS OF MAKING A POROUS ARTICLE THAT INCLUDES THE STEPS OF INCORPORATING IN A THERMOPLASTIC RESIN PLASTIC AT ABOUT 145 DEGREES C. BENZILMONOHYDRAZON, AND HEATING THE ARTICLE TO ABOUT 160 DEGREES C.
References Cited (Backward Citations)
US2394689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |