US2835653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyoxyethylene substituted polymers and their preparation
Assignee: Polaroid Corp
•
Filing: 1953-03-19
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Granted: 1958-05-20
•
Expires: 1973-03-19
Abstract
No abstract record available.
Inventors
- 👤 Howard C Haas
- 👤 Saul G Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:28
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G18/00; C08G18/06; C08G18/83; C08G18/831; C08G65/2618; C08G65/2633; C08G69/00; C08G69/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A SELF-SUPPORTED STRUCTURE COMPOSED OF A SOLD, WATER-INSOLUBLE, N-POLYOXYETHYLENE SUBSTITUTED SYNTHETIC LINEAR POLYMER COMPRISING RECURRING FUNCTION GROUPS CONTAINING FUNCTION NITROGEN ATOMS AND BEING SELECTED FROM THE CLASS CONSISTING OF
Claim 2
Dependent Claim
29 words
A SELF-SUPPORTED STRUCTURE COMPOSED OF A SOLD, WATER-INSOLUBLE, N-POLYOXYETHYLENE SUBSTITUTED SYNTHETIC LINEAR POLYMER COMPRISING RECURRING FUNCTION GROUPS CONTAINING FUNCTION NITROGEN ATOMS AND BEING SELECTED FROM THE CLASS CONSISTING OF
References Cited (Backward Citations)
US2289775A
Cited
US2448767A
Cited
US2456271A
Cited
US2465109A
Cited
US2574544A
Cited
US2652388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |