US2744076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of organoplastics in cellular form by means of chemical blowing agents
Assignee: Armstrong World Industries Inc
•
Filing: 1951-04-14
•
Granted: 1956-05-01
•
Expires: 1971-04-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Breuer
- 👤 Leo L Tolman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A METHOD OF MAKING A GAS-EXPANDED MATERIAL WHICH COMPRISES ADMIXING A COMPOUND OF THE GROUP CONSISTING OF 4,4,13,13-TETRAMETHYL-N,N''-DINITROSO-5,12-DIAZA-2,15HEXADECANEDIONE; 4,4,11,11-TETRAMETHYL-N,N''-DINITROSO5,10-DIAZA-2,13-TETRADECANEDIONE; AND 4,4,9,9-TETRAMETHYL-N,N''-DINITROSO-5,8-DIAZA-2,11-DODECANEDIONE WITH AN ORGANOPLASTIC OF THE GROUP CONSISTING OF STYRENE POLYMERS AND VINYL CHLORIDE POLYMERS AND DECOMPOSING SAID COMPOUND BY HEAT TO EVOLVE NITROGEN AND CARBON DIOXIDE AND EXPAND SAID ORGANOPLASTIC MATERIAL.
Claim 2
Independent Claim
52 words
A METHOD OF MAKING A GAS-EXPANDED MATERIAL WHICH COMPRISES ADMIXING A COMPOUND OF THE GROUP CONSISTING OF 4,4,13,13-TETRAMETHYL-N,N''-DINITROSO-5,12-DIAZA-2,15HEXADECANEDIONE; 4,4,11,11-TETRAMETHYL-N,N''-DINITROSO5,10-DIAZA-2,13-TETRADECANEDIONE; AND 4,4,9,9-TETRAMETHYL-N,N''-DINITROSO-5,8-DIAZA-2,11-DODECANEDIONE WITH AN ORGANOPLASTIC OF THE GROUP CONSISTING OF STYRENE POLYMERS AND VINYL CHLORIDE POLYMERS AND DECOMPOSING SAID COMPOUND BY HEAT TO EVOLVE NITROGEN AND CARBON DIOXIDE AND EXPAND SAID ORGANOPLASTIC MATERIAL.
References Cited (Backward Citations)
US2491709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |