US3932062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower blade for electric motors
Assignee: McGraw Edison Co
•
Filing: 1975-01-03
•
Granted: 1976-01-13
•
Expires: 1995-01-03
Abstract
Abstract An improved blower blade for electric motors is disclosed. The blower blade comprises from about 50 to about 75% polypropylene, from about 5 to about 10% glass fibers and from about 15 to about 45% inert filler.
Inventors
- 👤 Hollis D. Sisk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:38
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
A blower blade for electric motors comprising from about 50 to about 75% by weight polypropylene, from about 5 to about 10% by weight glass fibers, and from about 15 to about 45% inert filler.
Claim 2
Dependent Claim
35 words
A blower blade for electric motors comprising from about 50 to about 75% by weight polypropylene, from about 5 to about 10% by weight glass fibers, and from about 15 to about 45% inert filler.
Claim 3
Dependent Claim
28 words
The blower blade of claim 1 wherein the inert filler comprises at least one ingredient selected from the group consisting of talc, clay, diatomaceous earth, sand, and silica.
Claim 4
Dependent Claim
33 words
A blower blade for electric motors comprising about 60% by weight polypropylene, from about 5 to about 10% by weight glass fibers and from about 30 to about 35% by weight inert filler.
Claim 5
Dependent Claim
33 words
A blower blade for electric motors comprising about 60% by weight polypropylene, from about 5 to about 10% by weight glass fibers and from about 30 to about 35% by weight inert filler.
Claim 6
Dependent Claim
12 words
The blower blade of claim 3 wherein the inert filler is clay.
References Cited (Backward Citations)
US3033293A
Cited
DE1428152A1
Cited
US3245476A
Cited
US3306588A
Cited
US3408944A
Cited
US3706511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |