US3209464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Navigation instrument
Assignee: Individual
•
Filing: 1961-09-28
•
Granted: 1965-10-05
•
Expires: 1981-09-28
Abstract
No abstract record available.
Inventors
- 👤 Jack E Glatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:05
CPC Classifications
G; G01; G01C; G01C17/00; G01C17/02; G01C17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN AN INSTRUMENT A HOUSING, A CHAMBER IN SAID HOUSING, AN INSTRUMENT DATA SOURCE IN SAID CHAMBER, A SUPPLY OF FLUID IN SAID CHAMBER SURROUNDING AND CHAMBER, A SUPPLY SAID DATA SOURCE, SAID CHAMBER HAVING A ROOF, A PORTION OF SAID ROOF LYING IN UPWARDLY CONVERGING PLANES, SAID FLUID FILLING SAID CHAMBER AND IN CONTACT WITH ALL PORTIONS OF SAID ROOF, SAID ROOF BEING FORMED OF TRANSPARENT, LIGHT REFRACTING MATERIAL, SAID FLUID HAVING A LIGHT REFRACTING CHARACTERISTIC SUBSTANTIALLY EQUAL TO THAT OF SAID MATERIAL,
Claim 2
Dependent Claim
84 words
IN AN INSTRUMENT A HOUSING, A CHAMBER IN SAID HOUSING, AN INSTRUMENT DATA SOURCE IN SAID CHAMBER, A SUPPLY OF FLUID IN SAID CHAMBER SURROUNDING AND CHAMBER, A SUPPLY SAID DATA SOURCE, SAID CHAMBER HAVING A ROOF, A PORTION OF SAID ROOF LYING IN UPWARDLY CONVERGING PLANES, SAID FLUID FILLING SAID CHAMBER AND IN CONTACT WITH ALL PORTIONS OF SAID ROOF, SAID ROOF BEING FORMED OF TRANSPARENT, LIGHT REFRACTING MATERIAL, SAID FLUID HAVING A LIGHT REFRACTING CHARACTERISTIC SUBSTANTIALLY EQUAL TO THAT OF SAID MATERIAL,
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |