US3576590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur treatment of aromatic polyamide shaped articles
Assignee: Monsanto Co
•
Filing: 1967-09-22
•
Granted: 1971-04-27
•
Expires: 1987-09-22
Abstract
Abstract AROMATIC POLYAMIDE FIBER, FABRICS, AND OTHER SHAPED ARTICLES ARE CONVERTED INTO DIMENSIONALLY STABLE FIREPROOF PRODUCTS BY CONSTURCTIVE HEAT TREATMENT AT ELEVATED TEMPERATURES WITH ELEMENTAL SULFUR UNDER CONTROLLED CONDITIONS.
Inventors
- 👤 Stephen S Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:10
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/20; D01F9/24; D01F9/28; D01F9/30; D06; D06M; D06M11/00; D06M11/51; D06M11/52; C08J2377/00; C08J2377/10; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |