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Patent US3286531A successfully refreshed from Google Patents.
US3286531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Omni-directional anisotropic molecular trap
Assignee: Individual
•
Filing: 1964-06-03
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Granted: 1966-11-22
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Expires: 1984-06-03
Abstract
No abstract record available.
Inventors
- 👤 Shapiro Harold
- 👤 William F Hardgrove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:46
CPC Classifications
B; B64; B64G; B64G7/00; G; G01; G01M; G01M9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN AN EVACUATED VACUUM CHAMBER HAVING AN EVACUATING PUMP MEANS AND WHEREIN IT IS DESIRED THAT SUBSTANTIALLY ALL MOLECULAR BOUNCE-BACK OF MOLECULES LIBERATED FROM AN OBJECT BEING TESTED THEREIN BE ELIMINATED, THE IMPROVEMENT COMPRISING: A STRUCTURE FOR FORMING WITHIN SAID CHAMBER A DEFINED AREA FOR LOCATING SAID OBJECT, SAID STRUCTURE PROVIDING SUBSTANTIALLY NO WALL SURFACE PERPEN-
Claim 2
Dependent Claim
56 words
IN AN EVACUATED VACUUM CHAMBER HAVING AN EVACUATING PUMP MEANS AND WHEREIN IT IS DESIRED THAT SUBSTANTIALLY ALL MOLECULAR BOUNCE-BACK OF MOLECULES LIBERATED FROM AN OBJECT BEING TESTED THEREIN BE ELIMINATED, THE IMPROVEMENT COMPRISING: A STRUCTURE FOR FORMING WITHIN SAID CHAMBER A DEFINED AREA FOR LOCATING SAID OBJECT, SAID STRUCTURE PROVIDING SUBSTANTIALLY NO WALL SURFACE PERPEN-
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |