US3139115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lined vacuum bellows
Assignee: JOHN L DORE CO
•
Filing: 1963-03-18
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Granted: 1964-06-30
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Expires: 1983-03-18
Abstract
No abstract record available.
Inventors
- 👤 James S Bawcon
- 👤 Jr Frank G Weeden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:43
CPC Classifications
F; F16; F16L; F16L51/00; F16L51/02; F16L51/022; F16L51/024; F16L55/00; F16L55/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49877
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
THE IMPROVEMENT IN A FLEXIBLE REINFORCED VACUUM BELLOWS HAVING A RADIALLY OUTWARDLY EXTENDING U-SHAPED CONVOLUTION OF: AN INTEGRAL LINER, A SHOULDER EXTENDING AXIALLY FROM THE OUTER SURFACE OF THE LINER AT THE CONVOLUTION, AND AN ANNULAR BAND PRESSING RADIALLY OUTWARDLY AGAINST THE SHOULDER.
References Cited (Backward Citations)
DE23638C
Cited
US2953618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |