US3525708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant polyurethane coating compositions
Assignee: NL SPENCER KELLOG Inc
•
Filing: 1965-08-09
•
Granted: 1970-08-25
•
Expires: 1985-08-09
Abstract
No abstract record available.
Inventors
- 👤 Charles C Clark
- 👤 Arthur J Krawczyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:18
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3215; C08G18/38; C08G18/3802; C08G18/3804; C08G18/3806; C08G18/3878; C08G18/40; C08G18/48; C08G18/50; C08G18/5075; C09; C09D; C09D175/00; C09D175/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3102875A
Cited
US3004073A
Cited
US3235517A
Cited
US3171819A
Cited
US3284404A
Cited
US3220961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |