Patent US3743777A successfully refreshed from Google Patents.
US3743777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hardening coatings with lasers emitting infra-red radiation
Assignee: Allnex Austria GmbH
•
Filing: 1970-07-10
•
Granted: 1973-07-03
•
Expires: 1990-07-10
Abstract
Abstract This invention is directed to a process for hardening or curing conventional protective coatings applied to a suitable substrate utilizing lasers emitting infra-red radiation with a wave length of from 1-100 Mu and preferably 3-25 Mu . The coatings are hardened within a few minutes of treatment without discoloration normally associated with short curing durations.
Inventors
- 👤 H Hanus
- 👤 F Aussenegg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:43
CPC Classifications
B; B05; B05D; B05D3/00; B05D3/02; C; C08; C08L; C08L67/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
28 words
The method according to claim 1 wherein said scanning is with a diverged infra-red laser beam, said diverging being performed by directing said beam through an optical element.
Claim 2
Dependent Claim
47 words
periodically and controllably scanning the entire surface of said coated substrate with an infra-red laser beam in a dosage effective to harden said unhardened coating composition by thermic action, the wavelengths of the radiation being in the range of from about 1 to 100 Mu ; and
Claim 3
Dependent Claim
15 words
discontinuing said scanning when said coating on said substrate is hardened to the thermoset state.
Claim 4
Dependent Claim
15 words
The method according to claim 1 wherein said scanning is with an undiverged laser beam.
Claim 5
Dependent Claim
15 words
The method according to claim 3 wherein said scanning is accomplished by moving the laser.
Claim 6
Dependent Claim
19 words
The method of claim 3 wherein said scanning is accomplished by moving optical elements to deflect the laser beam.
Claim 7
Dependent Claim
24 words
The method according to claim 1 wherein the scanning is accomplished by periodically moving the protective coating being irradiated relative to the laser beam.
Claim 8
Dependent Claim
21 words
The method according to claim 1 wherein said scanning is accomplished by moving both said beam and protective coating being irradiated.
Claim 9
Dependent Claim
16 words
The method according to claim 1 wherein said laser beam is provided from a CO2 laser.
References Cited (Backward Citations)
US2498339A
Cited
US2820131A
Cited
US3305666A
Cited
US3364087A
Cited
US3398016A
Cited
US3392045A
Cited
US3409460A
Cited
US3396401A
Cited
US3410203A
Cited
US3506779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |