Patent US3451722A successfully refreshed from Google Patents.
US3451722A
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US
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Resilient mounted cutter head for tunneling machine
Assignee: S AND M CONSTRUCTORS Inc
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Filing: 1967-12-04
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Granted: 1969-06-24
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Expires: 1987-12-04
Abstract
No abstract record available.
Inventors
- 👤 Victor J Scaravilli
- 👤 Charles J Delisio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:05
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; E; E21; E21D; E21D9/00; E21D9/10; E21D9/1086; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20507; F15B2211/20515; F15B2211/2053; F15B2211/20538; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/31; F15B2211/3105; F15B2211/3116; F15B2211/40; F15B2211/405; F15B2211/40523; F15B2211/4053; F15B2211/415; F15B2211/41509; F15B2211/41527; F15B2211/455; F15B2211/46; F15B2211/70; F15B2211/71; F15B2211/7114; F15B2211/7128; F15B2211/7142; F15B2211/78; F15B2211/781
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2633008A
Cited
US3342530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |