Patent US3433682A successfully refreshed from Google Patents.
US3433682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon coated graphite
Assignee: Trane US Inc
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Filing: 1965-07-06
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Granted: 1969-03-18
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Expires: 1985-07-06
Abstract
No abstract record available.
Inventors
- 👤 Ilmar L Kalnin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:49
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; Y; Y10; Y10S; Y10S148/00; Y10S148/016; Y10S148/025; Y10S148/148; Y10S148/17; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2938816A
Cited
US2984604A
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US3288637A
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US3158504A
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US3160522A
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US3122424A
Cited
US3253331A
Cited
US3312572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |