Patent US3563673A successfully refreshed from Google Patents.
US3563673A
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Ultra high vacuum diffusion pump fluid and method of using same
Assignee: Lion Corp
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Filing: 1968-12-12
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Granted: 1971-02-16
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Expires: 1988-12-12
Abstract
Abstract AN ULTRA HIGH VACUUM DIFFUSION PUMP FLUID WHICH SERVES TO PRODUCE AS DESIRED DEGREE OF VACUUM LESS THAN 10-9 TORR, CONSISTS ESSENTIALLY OF THE CONDENSATION PRODUCT OF AN OLEFIN HAVING TWENTY TO TWENTY-FOUR CARBON ATOMS WITH NAPTHALENE, METHYLNAPHTHALENE OR ETHYLNAPTHALENE.
Inventors
- 👤 Kohei Sakuma
- 👤 Hisashi Oikawa
- 👤 Syuhei Tanimori
- 👤 Masayasu Takao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:07
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C10M2203/00; C10M2203/06; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |