Patent US2616866A successfully refreshed from Google Patents.
US2616866A
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Fire retardant
Assignee: Pyrotron Dev Corp
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Filing: 1949-04-26
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Granted: 1952-11-04
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Expires: 1969-04-26
Abstract
No abstract record available.
Inventors
- 👤 Juda Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:49
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/429; C; C08; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06; C08G14/08; C08G14/12; C09; C09D; C09D5/00; C09D5/18; C09D5/185; D06M15/63; Y; Y10; Y10S; Y10S521/00; Y10S521/907; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31942; Y10T428/31949
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A FIRE-RETARDANT AND POTENTIALLY HEAT INSULATING COMPOSITION COMPRISING, AS THE PRINCIPAL FIRE-RETARDANT INGREDIENT, SUBSTANTIAL AMOUNTS OF A MATERIAL SELECTED FORM THE GROUP CONSISTING OF (1) A UREA SALT OF A SULFONIC ACID OF A MONOHYDRIC PHENOL SELECTED FROM THE GROUP CONSISTING OF HYDROXY BENZENE AND MONOALKYL SUBSTITUTED DERIVATIVES THEREOF, AND (2) THE CONDENSATION POLYMER OF AN ALDEHYDE THEREWITH, EACH NEUTRALIZED WITH AN INORGANIC VOLATILE BASE.
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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |