US2790660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spacers for thermal diffusion apparatus
Assignee: Standard Oil Co
•
Filing: 1953-09-14
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Granted: 1957-04-30
•
Expires: 1973-09-14
Abstract
No abstract record available.
Inventors
- 👤 Jones Arthur Letcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
IN A GASKET HAVING SUBSTANTIALLY PARALLEL LATERAL FACES OF GREATER WIDTH THAN THE THICKNES OF THE GASKET
Claim 2
Dependent Claim
17 words
IN A GASKET HAVING SUBSTANTIALLY PARALLEL LATERAL FACES OF GREATER WIDTH THAN THE THICKNES OF THE GASKET
References Cited (Backward Citations)
US494402A
Cited
US1932039A
Cited
US2191044A
Cited
US2455982A
Cited
US2532891A
Cited
US2639174A
Cited
US2739001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |