Patent US3236935A successfully refreshed from Google Patents.
US3236935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room shielded from the effect of an ambient magnetic field
Assignee: ExxonMobil Oil Corp
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Filing: 1963-02-25
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Granted: 1966-02-22
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Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 Bobbie J Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:05
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
AN ENCLOSED SPACED UNDER THE INFLUENCE OF AN AMBIENT MAGNETIC FIELD WHEREIN THE EFFECT OF SAID AMBIENT MAGNETIC FIELD INTERNALLY OF SAID SPACE IS DIMINISHED COMPRISING A CUBE OF A FERROMAGNETIC MATERIAL, WHICH CUBE OF FERROMAGNETIC MATERIAL HAD CHARACTERISTICS WHICH SATISFY THE FORMULA:
Claim 2
Dependent Claim
43 words
AN ENCLOSED SPACED UNDER THE INFLUENCE OF AN AMBIENT MAGNETIC FIELD WHEREIN THE EFFECT OF SAID AMBIENT MAGNETIC FIELD INTERNALLY OF SAID SPACE IS DIMINISHED COMPRISING A CUBE OF A FERROMAGNETIC MATERIAL, WHICH CUBE OF FERROMAGNETIC MATERIAL HAD CHARACTERISTICS WHICH SATISFY THE FORMULA:
References Cited (Backward Citations)
US2026060A
Cited
US2200678A
Cited
US2388848A
Cited
US2757225A
Cited
US2860176A
Cited
US2853541A
Cited
US2838592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |