Patent US3102194A successfully refreshed from Google Patents.
US3102194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutter for electron microscopes
Assignee: US Philips Corp
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Filing: 1959-09-03
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Granted: 1963-08-27
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Expires: 1979-09-03
Abstract
No abstract record available.
Inventors
- 👤 Broek Simon Lourens Van Den
- 👤 Marien Hendricus Corne Johanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:56
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/22; H01J37/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
AN ELECTRON MICROSCOPE COMPRISING AN EVACUATED CHAMBER IN WHICH A BEAM OF CHARGED PARTICLES TRAVELS TOWARD A RECEIVING AREA, AND A SHUTTER FOR INTERCEPTING AT LEAST A PORTION OF THE BEAM OF CHARGED PARTICLES BEFORE REACHING THE RECEIVING AREA, SAID SHUTTER COMPRISING TWO BLADES EACH OF WHICH INTERCEPTS A PORTION OF THE BEAM OF CHARGED PARTICLES TRAVELLING TOWARD THE RECEIVING AREA, EACH OF SAID BLADES BEING ROTATABLE ABOUT AN AXIS REMOTE FROM THE BEAM OF CHARGED PARTICLES, AND MEANS FOR ROTATING SAID BLADES IN THE PATH OF SAID BEAM TO OPEN AND CLOSE THE SHUTTER INCLUDING A TENSION SPRING CONNECTED TO ONE BLADE AND A SEPARATE TENSION SPRING CONNECTED TO THE OTHER BLADE, A MOVABLE MEMBER COUPLED TO THE ENDS OF THE SPRING REMOTE FROM EACH SHUTTER BLADE, MEANS TO MOVE THE MOVABLE MEMBER FROM OUTSIDE THE CHAMBER WHEREBY THE BLADES CAN BE SELECTIVELY ROTATED INTO A CLOSED AND OPEN POSITION, AND LOCK MEANS OPERABLE FROM OUTSIDE THE CHAMBER FOR PREVENTING ROTATION OF ONE OF THE BLADES WHILE THE OTHER BLADE IS ROTATED.
Claim 2
Dependent Claim
173 words
AN ELECTRON MICROSCOPE COMPRISING AN EVACUATED CHAMBER IN WHICH A BEAM OF CHARGED PARTICLES TRAVELS TOWARD A RECEIVING AREA, AND A SHUTTER FOR INTERCEPTING AT LEAST A PORTION OF THE BEAM OF CHARGED PARTICLES BEFORE REACHING THE RECEIVING AREA, SAID SHUTTER COMPRISING TWO BLADES EACH OF WHICH INTERCEPTS A PORTION OF THE BEAM OF CHARGED PARTICLES TRAVELLING TOWARD THE RECEIVING AREA, EACH OF SAID BLADES BEING ROTATABLE ABOUT AN AXIS REMOTE FROM THE BEAM OF CHARGED PARTICLES, AND MEANS FOR ROTATING SAID BLADES IN THE PATH OF SAID BEAM TO OPEN AND CLOSE THE SHUTTER INCLUDING A TENSION SPRING CONNECTED TO ONE BLADE AND A SEPARATE TENSION SPRING CONNECTED TO THE OTHER BLADE, A MOVABLE MEMBER COUPLED TO THE ENDS OF THE SPRING REMOTE FROM EACH SHUTTER BLADE, MEANS TO MOVE THE MOVABLE MEMBER FROM OUTSIDE THE CHAMBER WHEREBY THE BLADES CAN BE SELECTIVELY ROTATED INTO A CLOSED AND OPEN POSITION, AND LOCK MEANS OPERABLE FROM OUTSIDE THE CHAMBER FOR PREVENTING ROTATION OF ONE OF THE BLADES WHILE THE OTHER BLADE IS ROTATED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |