US3537944A
Expired / Lapsed
US
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Transparent heat reflecting window having relatively low internal visual reflection
Assignee: Pilkington North America Inc
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Filing: 1967-03-17
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Granted: 1970-11-03
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Expires: 1987-03-17
Abstract
No abstract record available.
Inventors
- 👤 Albany D Grubb
- 👤 Charles M Browne
- 👤 Peter H Berning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:06
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10174; B32B17/1055; B32B17/10761; B32B27/00; E; E06; E06B; E06B3/00; E06B3/66; E06B3/67; E06B3/6715; E06B7/00; E06B7/28; G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/23; G02B5/28; G02B5/281; G02B5/282; Y; Y10; Y10S; Y10S126/00; Y10S126/907; Y10S126/908; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/3163
Claims Analysis
Total Claims: 0
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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) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |