Patent US4582540A successfully refreshed from Google Patents.
US4582540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing glazing putty from windows
Assignee: Utvecklings Carmen AB
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Filing: 1984-04-12
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Granted: 1986-04-15
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Expires: 2004-04-12
Abstract
Abstract A method of removing putty from windows by heating the putty until it softens, by means of infrared radiation (4) which is focused onto the putty, and the putty thus heated by infrared radiation is scraped away. Use may be made of an infrared heating apparatus (1) having an elongate heating wire (2) and an elliptical reflector (3) for focusing the infrared radiation (4) thus produced in a focal line (5), the apparatus also having a spacer member (8) extending up to the focal line and having an elongate opening (9) essentially in the plane of the focal line for conducting the infrared radiation to the putty.
Inventors
- 👤 Hans C. Allback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:04
CPC Classifications
E; E04; E04F; E04F21/00; E04F21/28; E04F21/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
A method of removing putty from a window frame, comprising the steps of: focussing infrared radiation onto the putty to thereby heat only the putty until its softens, and scraping away the softened putty.
Claim 2
Independent Claim
34 words
A method of removing putty from a window frame, comprising the steps of: focussing infrared radiation onto the putty to thereby heat only the putty until its softens, and scraping away the softened putty.
Claim 3
Independent Claim
99 words
A method of removing from a window a first strand of putty betweeen one side of a pane and a window frame and a second strand of putty between the other side of the pane and the window frame, comprising the steps of: focussing infrared radiation onto the first strand of putty to thereby heat the same until it softens, scraping away the softened first strand of putty, focussing infrared radiation onto the second strand of putty through the pane to thereby heat the second strand of putty until it softens, and scraping away the second strand of putty.
Claim 4
Independent Claim
99 words
A method of removing from a window a first strand of putty betweeen one side of a pane and a window frame and a second strand of putty between the other side of the pane and the window frame, comprising the steps of: focussing infrared radiation onto the first strand of putty to thereby heat the same until it softens, scraping away the softened first strand of putty, focussing infrared radiation onto the second strand of putty through the pane to thereby heat the second strand of putty until it softens, and scraping away the second strand of putty.
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) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |