US3803281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing polyurethane belts
Assignee: Engineered Fabrics Corp
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Filing: 1971-09-07
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Granted: 1974-04-09
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Expires: 1991-09-07
Abstract
Abstract A CURED POLYURETHANE COMPOSITION PREPARED BY MIXING A PARTICULATE POLYFLUOROHYDROCARBON RESIN WITH A LIQUID POLYURETHANE PREPOLYMER AND CURING THE SAID PREPOLYMER WITH A CURING AGENT. THE CURED POLYURETHANE COMPOSITION HAS UTILITY IN POWER TRANSMISSION BELTS AND PARTICULARLY POWER TRANSMISSION BELTS OF THE V-TYPE, AND OTHER RELATIVELY FLAT-TYPE BELTS WHICH OPERATE IN CONJUNCTION WITH PULLEYS OR SPROCKETS AND ARE SUBJECT TO RELATIVELY SEVERE FLEXING DURING THEIR OPERATION.
Inventors
- 👤 S Fix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:41
CPC Classifications
F; F16; F16G; F16G5/00; F16G5/12; F16G5/14; B; B29; B29D; B29D29/00; B29D29/10; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/67; C08G18/69; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 0
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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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |