US3178560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical de-icing devices
Assignee: Dowty Rotol Ltd
•
Filing: 1961-11-14
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Granted: 1965-04-13
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Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Mapp
- 👤 Arthur J Hayward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
A; A47; A47L; A47L1/00; A47L1/16; B; B64; B64D; B64D15/00; B64D15/12; H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/014; H05B2203/017; H05B2203/033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A DIE-ICING DEVICE SUITABLE FOR SECURING UPON A PART AT LEAST OF A MEMBER SUCH AS A PROPELLER BLADE, TO BE DE-ICED, SAID DEVICE INCLUDING A PROTECTIVE SHEET OF ABRASION-RESISTANT FLEXIBLE MATERIAL OF DIMENSIONS TO COVER AT LEAST THE MAJOR PORTION OF THAT PART OF THE MEMBER THAT IS TO BE PROTECTED, AN EDGING OF A READILY-TRIMMABLE FLEXIBLE MATERIAL ABUTTING AND JOINED TO THE EDGES OF THE SHEET OF ABRASION-RESISTANT MATERIAL, THE CHORDWISE EDGES OF THE ABUTTING SHEET AND THE EDGING MATERIAL BEING COMPLEMENTALLY SCARFED, AND HEATING MEANS BENEATH SAID PROTECTIVE SHEET, AND ENCLOSED AT ITS EDGES BY SAID EDGING.
Claim 2
Dependent Claim
100 words
A DIE-ICING DEVICE SUITABLE FOR SECURING UPON A PART AT LEAST OF A MEMBER SUCH AS A PROPELLER BLADE, TO BE DE-ICED, SAID DEVICE INCLUDING A PROTECTIVE SHEET OF ABRASION-RESISTANT FLEXIBLE MATERIAL OF DIMENSIONS TO COVER AT LEAST THE MAJOR PORTION OF THAT PART OF THE MEMBER THAT IS TO BE PROTECTED, AN EDGING OF A READILY-TRIMMABLE FLEXIBLE MATERIAL ABUTTING AND JOINED TO THE EDGES OF THE SHEET OF ABRASION-RESISTANT MATERIAL, THE CHORDWISE EDGES OF THE ABUTTING SHEET AND THE EDGING MATERIAL BEING COMPLEMENTALLY SCARFED, AND HEATING MEANS BENEATH SAID PROTECTIVE SHEET, AND ENCLOSED AT ITS EDGES BY SAID EDGING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |