Patent US3434779A successfully refreshed from Google Patents.
US3434779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical power limiter
Assignee: AT&T Inc
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Filing: 1966-02-04
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Granted: 1969-03-25
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Expires: 1986-02-04
Abstract
No abstract record available.
Inventors
- 👤 Theodoor C Damen
- 👤 Rogerio C C Leite
- 👤 Sergio P S Porto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:30
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN COMBINATION, MEANS FOR SUPPLYING ELECTROMAGNETIC RADIATION IN THE FORM OF A BEAM, MEANS FOR UTILIZING SAID RADIATION, AND MEANS INTERMEDIATE THE SUPPLYING AND UTILIZING MEANS FOR LIMITING THE PORTION OF SAID RADIATION MADE AVAILABLE TO SAID UTILIZING MEANS, SAID LIMITING MEANS COMPRISING MEANS FOR A PORTION OF SAID RADIATION TO PRODUCE A REFRACTIVE GRADIENT TRANSVERSE TO SAID BEAM TO DEFOCUS SAID BEAM, THE AMOUNT OF DEFOCUSING BEING RELATED TO THE POWER LEVEL OF SAID BEAM, AND APERTURED MEANS FOR PASSING TO SAID UTILIZING MEANS A CENTRAL PORTION OF SAID BEAM, WHICH CENTRAL PORTION MAINTAINS A SUBSTANTIALLY CONSTANT POWER DENSITY AS THE POWER LEVEL OF THE RADIATION FLUCTUATES.
Claim 2
Dependent Claim
108 words
IN COMBINATION, MEANS FOR SUPPLYING ELECTROMAGNETIC RADIATION IN THE FORM OF A BEAM, MEANS FOR UTILIZING SAID RADIATION, AND MEANS INTERMEDIATE THE SUPPLYING AND UTILIZING MEANS FOR LIMITING THE PORTION OF SAID RADIATION MADE AVAILABLE TO SAID UTILIZING MEANS, SAID LIMITING MEANS COMPRISING MEANS FOR A PORTION OF SAID RADIATION TO PRODUCE A REFRACTIVE GRADIENT TRANSVERSE TO SAID BEAM TO DEFOCUS SAID BEAM, THE AMOUNT OF DEFOCUSING BEING RELATED TO THE POWER LEVEL OF SAID BEAM, AND APERTURED MEANS FOR PASSING TO SAID UTILIZING MEANS A CENTRAL PORTION OF SAID BEAM, WHICH CENTRAL PORTION MAINTAINS A SUBSTANTIALLY CONSTANT POWER DENSITY AS THE POWER LEVEL OF THE RADIATION FLUCTUATES.
References Cited (Backward Citations)
US3297876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |