Patent US2992955A successfully refreshed from Google Patents.
US2992955A
Expired / Lapsed
US
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Zero volume air tube and method of making
Assignee: Individual
•
Filing: 1958-01-13
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Granted: 1961-07-18
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Expires: 1978-01-13
Abstract
No abstract record available.
Inventors
- 👤 Hulie E Bowerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:20
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/49877
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
THE METHOD OF MAKING AN INFLATABLE TUBE FOR CLUTCHES AND THE LIKE COMPRISING THE STEPS OF: MOLDING AN OPEN FACE BLADDER OF FLEXIBLE MATERIAL INTO A SEMI-C SHAPE HAVING ROUND END SECTIONS ADAPTED TO RECEIVE O RINGS, INSERTING O RINGS INTO SAID SECTION, CEMENTING A FLAT COVER OVER THE TOP OF THE OPEN FACE OF SAID BLADDER AND FORMING AN INNER CAVITY THEREIN, FORMING AN OPENING IN THE BLADDER, INSERTING A SPUD THROUGH THE OPENING TO INTRODUCE FLUID THEREIN FOR FILLING THE INNER CAVITY, CEMENTING A REINFORCING FABRIC AROUND THE OUTER CIRCUMFERENCE OF
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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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |