US2730626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airborne radiation detector
Assignee: Individual
•
Filing: 1948-07-28
•
Granted: 1956-01-10
•
Expires: 1968-07-28
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Varney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:16
CPC Classifications
G; G01; G01T; G01T7/00; G01T7/02; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN A CONSTANT ALTITUDE BALLON, AN IMPERVIOUS ENVELOPE ADAPTED TO BE INFLATED WITH A LIGHTER-THAN-AIR GAS; A LIGHTER-THAN-AIR GAS GENERATOR ATTACHED TO AND SUPPORTED BY SAID ENVELOPE FOR AUTOMATICALLY INFLATING SAID ENVELOPE, SAID ALTITUDE RESPONSIVE MEANS TO CONTROL THE VOLUME OF SAID GAS IN SAID ENVELOPE TO MAINTAIN SAID ENVELOPE AT A PREDETERMINED ALTITUDE.
Claim 2
Dependent Claim
54 words
IN A CONSTANT ALTITUDE BALLON, AN IMPERVIOUS ENVELOPE ADAPTED TO BE INFLATED WITH A LIGHTER-THAN-AIR GAS; A LIGHTER-THAN-AIR GAS GENERATOR ATTACHED TO AND SUPPORTED BY SAID ENVELOPE FOR AUTOMATICALLY INFLATING SAID ENVELOPE, SAID ALTITUDE RESPONSIVE MEANS TO CONTROL THE VOLUME OF SAID GAS IN SAID ENVELOPE TO MAINTAIN SAID ENVELOPE AT A PREDETERMINED ALTITUDE.
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) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |