Patent US2890515A successfully refreshed from Google Patents.
US3765975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windshield repair
Assignee: 3M Co
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Filing: 1971-12-17
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Granted: 1973-10-16
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Expires: 1991-12-17
Abstract
Abstract In-place permanent repair of pockmarked windshields involves vibrationless application of curable liquid resin under defined conditions of temperature and pressure.
Inventors
- 👤 G Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
B; B29; B29C; B29C73/00; B29C73/02; B29C73/025; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10807; B32B17/10963; B29L; B29L2031/00; B29L2031/30; B29L2031/3052; Y; Y10; Y10T; Y10T428/00; Y10T428/20; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
Method of claim 1 wherein said temperature and said maximum pressure are held within the area BCFG of said graph.
Claim 2
Dependent Claim
64 words
Method of claim 1 including the step of applying a surface coating of transparent liquid polymerizable resin composition over the filled pockmark area prior to complete curing of said filler resin and then continuing the cure, and wherein the composition of said surface coating is formulated to provide a cured product of substantially greater hardness than the cured product of said filler resin composition.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |