Patent US3472553A successfully refreshed from Google Patents.
US3472553A
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US
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Method of and apparatus for extracting bitumen
Assignee: BRUNO H MILLER
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Filing: 1967-05-03
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Granted: 1969-10-14
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Expires: 1987-05-03
Abstract
No abstract record available.
Inventors
- 👤 Bruno H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:05
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B43/00; E21B43/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL286814A
Cited
US1285347A
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US1476747A
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US1467480A
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US1558596A
Cited
US1607586A
Cited
US2251916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |