US2847071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of igniting a gas air-burner utilizing pelletized phosphorus
Assignee: California Research LLC
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Filing: 1955-09-20
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Granted: 1958-08-12
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Expires: 1975-09-20
Abstract
No abstract record available.
Inventors
- 👤 Priester Coral L De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:49
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
METHOD OF IGNITING A DOWNHOLE GAS-AIR BURNER COMPRISING THE STEPS OF INTRODUCING INTO SAID BURNER A PELLET COMPRISING ELEMENTAL PHOSPHORUS SURROUNDED BY ICE, SAID ICE MELTING IN SAID BURNER TO EXPOSE SAID PHOSPHORUS, AND SUPPLYING A GASEOUS, COMBUSTIBLE OXYGENCONTAINING MIXTURE TO SAID BURNER FOR OXIDIZING SAID EX-
Claim 2
Dependent Claim
47 words
METHOD OF IGNITING A DOWNHOLE GAS-AIR BURNER COMPRISING THE STEPS OF INTRODUCING INTO SAID BURNER A PELLET COMPRISING ELEMENTAL PHOSPHORUS SURROUNDED BY ICE, SAID ICE MELTING IN SAID BURNER TO EXPOSE SAID PHOSPHORUS, AND SUPPLYING A GASEOUS, COMBUSTIBLE OXYGENCONTAINING MIXTURE TO SAID BURNER FOR OXIDIZING SAID EX-
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |